Compat with numpy dev argsort (radix sort added)
https://github.com/numpy/numpy/commit/12fb1015511ac3804d0785bb0d1fe539385548ad
adds radix sort to np.argsort. For versions of NumPy with this change
(>=1.17), we need to adjust our validator.

Closes https://github.com/pandas-dev/pandas/issues/26361
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=h1) Report
> Merging [#26373](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/b48d1ff87237cb68792590f4377e3be5c73d5ea7?src=pr&el=desc) will **decrease** coverage by `50.48%`.
> The diff coverage is `75%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/26373/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=tree)

```diff
@@             Coverage Diff             @@
##           master   #26373       +/-   ##
===========================================
- Coverage   91.68%   41.19%   -50.49%     
===========================================
  Files         174      174               
  Lines       50700    50703        +3     
===========================================
- Hits        46486    20889    -25597     
- Misses       4214    29814    +25600
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `?` | |
| #single | `41.19% <75%> (-0.15%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/compat/numpy/function.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2NvbXBhdC9udW1weS9mdW5jdGlvbi5weQ==) | `60.45% <75%> (-30.36%)` | :arrow_down: |
| [pandas/io/formats/latex.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvbGF0ZXgucHk=) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/io/sas/sas\_constants.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3Nhcy9zYXNfY29uc3RhbnRzLnB5) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/core/groupby/categorical.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ3JvdXBieS9jYXRlZ29yaWNhbC5weQ==) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/tseries/plotting.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvcGxvdHRpbmcucHk=) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/tseries/converter.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL3RzZXJpZXMvY29udmVydGVyLnB5) | `0% <0%> (-100%)` | :arrow_down: |
| [pandas/io/formats/html.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvaHRtbC5weQ==) | `0% <0%> (-99.37%)` | :arrow_down: |
| [pandas/io/sas/sas7bdat.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3Nhcy9zYXM3YmRhdC5weQ==) | `0% <0%> (-91.16%)` | :arrow_down: |
| [pandas/io/sas/sas\_xport.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3Nhcy9zYXNfeHBvcnQucHk=) | `0% <0%> (-90.1%)` | :arrow_down: |
| [pandas/core/tools/numeric.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvdG9vbHMvbnVtZXJpYy5weQ==) | `10.44% <0%> (-89.56%)` | :arrow_down: |
| ... and [130 more](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree-more) | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=footer). Last update [b48d1ff...eb3fba5](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=h1) Report
> Merging [#26373](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/b48d1ff87237cb68792590f4377e3be5c73d5ea7?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `75%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/26373/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #26373      +/-   ##
==========================================
- Coverage   91.68%   91.67%   -0.01%     
==========================================
  Files         174      174              
  Lines       50700    50703       +3     
==========================================
- Hits        46486    46484       -2     
- Misses       4214     4219       +5
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.18% <75%> (-0.01%)` | :arrow_down: |
| #single | `41.17% <75%> (-0.18%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/compat/numpy/function.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2NvbXBhdC9udW1weS9mdW5jdGlvbi5weQ==) | `90.39% <75%> (-0.41%)` | :arrow_down: |
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `78.94% <0%> (-10.53%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/26373/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.01% <0%> (-0.12%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=footer). Last update [b48d1ff...eb3fba5](https://codecov.io/gh/pandas-dev/pandas/pull/26373?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 Seems like an isort update is failing on master as well. I've pushed that here, so we can get master green in a single PR.

A quick review would be appreciated if anyone has time, since this is failing on master. lgtm. merge on green.