reportUnnecessaryTypeIgnoreComment for only pyright-specific ignores

[twoertwein]

Is your feature request related to a problem? Please describe.
Similar to #4243 but when a project prefers using the pyright-ignore comments only when mypy doesn't need the general ignore comment, i.e., pyright uses both ignore comments. In that case, reportUnnecessaryTypeIgnoreComment will flag ignores needed by mypy.

Describe the solution you’d like
"reportUnnecessaryTypeIgnoreComment": "pyright" to flag only pyright-specific ignore comments, while pyright still uses the general ignores for all other rules, i.e., "enableTypeIgnoreComments": true.

[erictraut]

All of the reportXXX configuration settings in pyright allow you to specify the diagnostic severity ("error", "warning", "information", or "none"). They also support true as an alias for "error" and false as an alias for "none". It wouldn't make sense to accept a value of "pyright" since that's not a valid diagnostic severity.

If you want pyright to ignore # type: ignore comments, you can use "enableTypeIgnoreComments": false. This works in conjunction with reportUnnecessaryTypeIgnoreComment as you would expect.