ENH: Add reversed to Series so that it is also a Sequence
Add Reversed so that it fulfills all properties of Sequence

- [ ] closes #xxxx (Replace xxxx with the Github issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

WIP to see if these is any appetite to add `__reversed__` to `Series` so that `Series[T]` would also be a `Sequence[T]`, which should help using `Series` throughout the python ecosystem.

xref pandas-dev/pandas-stubs#119 This is an impossible task since a `Sequence` much implement the following methods:

* `__getitem__`
* `__len__ `
* ` __contains__`
* `__iter__`
* `__reversed__`
* `index`  
* `count`

The `index` method cannot be implemented since since `index` returns the `index` and cannot be `index(loc: int)`.  This seems to me to be clearly forever unchangeable.
