Fix: Preserve parentheses when merging # type: ignore with other comments to prevent AST errors

[Nikhil172913832]

Description

Closes #4880

This PR fixes issue #4880 by ensuring that Black does not omit optional parentheses when doing so would merge a # type: ignore comment with other comments on the same line. Merging these comments causes Python's AST parser to lose the TypeIgnore node, resulting in AST equivalence failures and internal errors. The pr updates the logic in can_omit_invisible_parens() to detect and prevent this specific case.

Checklist - did you ...

• Implement any code style changes under the --preview style, following the stability policy?
• Add an entry in CHANGES.md if necessary?
• Add / update tests if necessary?
• Add new / update outdated documentation?

[github-actions]

diff-shades reports zero changes comparing this PR (e3eb52e) to main (2fd75b0).

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What is this? | Workflow run | diff-shades documentation

[Nikhil172913832]

I am examining the diff shades and will look for a way to avoid the unnecessary changes.