Reducing `tool.ruff.lint.per-file-ignores`.

[junkmd]

We are looking to reduce the number of rules ignored in tool.ruff.lint.per-file-ignores by delinting the codebase. This is a great opportunity for new contributors to get involved!

Guidelines:

• We welcome delinting of one rule per file, or keeping changes as small as possible per pull request, as it makes it easier for reviewers to check the changes.
• If your PR addresses multiple rules or files, reviewers might consider it a large change and suggest splitting it into multiple PRs.
• When modifying runtime codebases, be careful not to break backward compatibility. For example, when delinting E722 'bare-except', specifying the type of exception to catch may result in different behavior before and after the change.
• If you want to delint without changing the implementation, use the minimal # noqa: RULE comments.

[junkmd]

With the codebase changes up to commit 01ec70d, the following should definitely be achievable. I’ll leave these changes to new contributors.

 [tool.ruff.lint.per-file-ignores]
 # production
-"comtypes/_comobject.py" = ["E713", "E722", "F401"]
 "comtypes/_npsupport.py" = ["F401"]
 "comtypes/_vtbl.py" = ["E722"]
 "comtypes/connectionpoints.py" = ["F401", "F403", "F405"]

 "comtypes/shelllink.py" = ["F401"]
 "comtypes/util.py" = ["F403", "F405"]
 "comtypes/viewobject.py" = ["F403", "F405"]
-"comtypes/_post_coinit/unknwn.py" = ["F821"]
 "comtypes/client/__init__.py" = ["F401", "F403"]
 "comtypes/client/_code_cache.py" = ["E401", "E711"]
 "comtypes/client/_constants.py" = ["F401"]

 "comtypes/server/__init__.py" = ["E401"]
 "comtypes/server/automation.py" = ["F403", "F405"]
 "comtypes/server/connectionpoints.py" = ["F401", "F403", "F405"]
-"comtypes/server/inprocserver.py" = ["E713", "E722", "F403", "F405", "F841"]
+"comtypes/server/inprocserver.py" = ["E713", "E722", "F841"]
 "comtypes/server/localserver.py" = ["F401", "F403", "F405"]
-"comtypes/server/register.py" = ["F403", "F405", "E713", "E731"]
+"comtypes/server/register.py" = ["F403", "F405", "E713"]
 "comtypes/tools/codegenerator/codegenerator.py" = ["E713", "E721"]
 "comtypes/tools/codegenerator/helpers.py" = ["F401"]
 "comtypes/tools/codegenerator/packing.py" = ["F821", "F841"]