TST: Streaming of S3 files
Issue #17135 was resolved by an upstream change, this is just a unit test to avoid regressions.
CI will crash and burn as I didn't add `botocore` as a dependency properly. Any help on this appreciated. I think the easiest thing to do is to ensure the test is skipped without botocore, and rely on `s3fs` pulling it in as a dependency. # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22520?src=pr&el=h1) Report
> :exclamation: No coverage uploaded for pull request base (`master@fa47b8d`). [Click here to learn what that means](https://docs.codecov.io/docs/error-reference#section-missing-base-commit).
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/22520/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/22520?src=pr&el=tree)

```diff
@@            Coverage Diff            @@
##             master   #22520   +/-   ##
=========================================
  Coverage          ?   92.03%           
=========================================
  Files             ?      169           
  Lines             ?    50780           
  Branches          ?        0           
=========================================
  Hits              ?    46737           
  Misses            ?     4043           
  Partials          ?        0
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.44% <ø> (?)` | |
| #single | `42.22% <ø> (?)` | |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22520?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/22520?src=pr&el=footer). Last update [fa47b8d...14634b1](https://codecov.io/gh/pandas-dev/pandas/pull/22520?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/22520?src=pr&el=h1) Report
> :exclamation: No coverage uploaded for pull request base (`master@fa47b8d`). [Click here to learn what that means](https://docs.codecov.io/docs/error-reference#section-missing-base-commit).
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/22520/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/22520?src=pr&el=tree)

```diff
@@            Coverage Diff            @@
##             master   #22520   +/-   ##
=========================================
  Coverage          ?   92.03%           
=========================================
  Files             ?      169           
  Lines             ?    50780           
  Branches          ?        0           
=========================================
  Hits              ?    46737           
  Misses            ?     4043           
  Partials          ?        0
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.44% <ø> (?)` | |
| #single | `42.22% <ø> (?)` | |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22520?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/22520?src=pr&el=footer). Last update [fa47b8d...14634b1](https://codecov.io/gh/pandas-dev/pandas/pull/22520?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks!