ENH: Allow poorly formatted stata files to be read
Add a fall back decode path that allows improperly formatted Stata
files written in 118 format but using latin-1 encoded strings to be
read

closes #25960

- [x] closes #25960
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=h1) Report
> Merging [#25967](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/4814a2875d078d6e9e9300bd1f77af15ef4f0f0a?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25967/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #25967      +/-   ##
==========================================
- Coverage   91.84%   91.83%   -0.01%     
==========================================
  Files         175      175              
  Lines       52550    52550              
==========================================
- Hits        48266    48261       -5     
- Misses       4284     4289       +5
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.39% <ø> (ø)` | :arrow_up: |
| #single | `41.9% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/25967/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `75% <0%> (-12.5%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/25967/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `96.79% <0%> (-0.12%)` | :arrow_down: |
| [pandas/util/testing.py](https://codecov.io/gh/pandas-dev/pandas/pull/25967/diff?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvdGVzdGluZy5weQ==) | `90.61% <0%> (-0.11%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25967?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/25967?src=pr&el=footer). Last update [4814a28...733f7a9](https://codecov.io/gh/pandas-dev/pandas/pull/25967?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/25967?src=pr&el=h1) Report
> Merging [#25967](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/4814a2875d078d6e9e9300bd1f77af15ef4f0f0a?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25967/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #25967      +/-   ##
==========================================
- Coverage   91.84%   91.84%   -0.01%     
==========================================
  Files         175      175              
  Lines       52550    52550              
==========================================
- Hits        48266    48262       -4     
- Misses       4284     4288       +4
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.39% <ø> (ø)` | :arrow_up: |
| #single | `41.89% <ø> (-0.08%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/25967/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `75% <0%> (-12.5%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/25967/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `96.79% <0%> (-0.12%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25967?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/25967?src=pr&el=footer). Last update [4814a28...27a173d](https://codecov.io/gh/pandas-dev/pandas/pull/25967?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 lgtm. @bashtage if you can get the check_stacklevel to work would be great. I switched to `tm.assert_produces_warning`. Doesn't this automatically check the stacklevel?

https://github.com/pandas-dev/pandas/pull/25967/files#diff-ee04a1f9b23ca162f9592eef0caf0dbdR1621
 actually this does check, thanks @bashtage 