BUGfix: reset_index can reset index name (#17067)
- [ ] closes #17067
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

I added name parameter value to preserve index name before `reset_index`.

Oh, now I realize that I shouldn't modify core/common.py :(
I found where to fix, and working on it. # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17243?src=pr&el=h1) Report
> Merging [#17243](https://codecov.io/gh/pandas-dev/pandas/pull/17243?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/c0e37670dd578728f988a33bc21bc173b336249a?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17243/graphs/tree.svg?token=eZ4WkYLtcO&src=pr&width=650&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/17243?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #17243   +/-   ##
=======================================
  Coverage   91.53%   91.53%           
=======================================
  Files         148      148           
  Lines       48688    48688           
=======================================
  Hits        44566    44566           
  Misses       4122     4122
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.9% <100%> (ø)` | :arrow_up: |
| #single | `41.63% <66.66%> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17243?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/indexes/base.py](https://codecov.io/gh/pandas-dev/pandas/pull/17243/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9iYXNlLnB5) | `96.45% <100%> (ø)` | :arrow_up: |
| [pandas/core/common.py](https://codecov.io/gh/pandas-dev/pandas/pull/17243/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvY29tbW9uLnB5) | `92.92% <100%> (ø)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17243?src=pr&el=continue).
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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17243?src=pr&el=footer). Last update [c0e3767...5759763](https://codecov.io/gh/pandas-dev/pandas/pull/17243?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 can you rebase and update and move note to 0.22.0 can you rebase / update I rebased; if you can fix according to comments. @hurcy can you rebase this and update closing as stale