ENH: added an optional css id to `<table>` tags created by `frame.to_…
This is useful for the reasons mentioned in #8496

- Automatically create a random id for tables created using `_repr_html_` using uuid.
- Also updated `test_repr_html_float` to be more descriptive and avoid conflicts with random numbers in the id for`_repr_html_`

- [x] closes #8496
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

pls just push to the same PR don’t open/close new ones for the same issue # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/19594?src=pr&el=h1) Report
> Merging [#19594](https://codecov.io/gh/pandas-dev/pandas/pull/19594?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/b83512773ab0dd3908cf2ef5ccaddcd8e0337c64?src=pr&el=desc) will **decrease** coverage by `0.02%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/19594/graphs/tree.svg?src=pr&token=eZ4WkYLtcO&width=650&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/19594?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #19594      +/-   ##
==========================================
- Coverage   91.62%   91.59%   -0.03%     
==========================================
  Files         150      150              
  Lines       48790    48795       +5     
==========================================
- Hits        44703    44696       -7     
- Misses       4087     4099      +12
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.97% <100%> (-0.03%)` | :arrow_down: |
| #single | `41.72% <16.66%> (-0.01%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/19594?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/19594/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.42% <ø> (ø)` | :arrow_up: |
| [pandas/io/formats/format.py](https://codecov.io/gh/pandas-dev/pandas/pull/19594/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2Zvcm1hdHMvZm9ybWF0LnB5) | `96.25% <100%> (+0.01%)` | :arrow_up: |
| [pandas/plotting/\_converter.py](https://codecov.io/gh/pandas-dev/pandas/pull/19594/diff?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb252ZXJ0ZXIucHk=) | `65.22% <0%> (-1.74%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/19594?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/19594?src=pr&el=footer). Last update [b835127...a217db3](https://codecov.io/gh/pandas-dev/pandas/pull/19594?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks @samghelms  Thanks @samghelms 