ENH: Give name to index column as argument when using `df.reset_index`
#### Is your feature request related to a problem?

When resetting the index of a `DataFrame`, and when needing to rename the "index" column to something more useful, it would be nice to do it directly with the call to`reset_index` (and not afterwards with `df.rename`).
#### Describe the solution you'd like

`DataFrame.reset_index` should get a new parameter `name` that renames the "index" column after resetting.

#### API breaking implications

I don't see any obvious implications.