Fix Drupal.Commenting.FunctionComment.MissingParamType

Not much left to do here to enable the sniff globally.

Inspector needed some code changes, I think these are OK to do here though as I can't see anyone overriding or extending this class.

Woo! Excellent work

Remaining changes seem fine to me.

The Needs Review Queue Bot → tested this issue. It fails the Drupal core commit checks. Therefore, this issue status is now "Needs work".

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Update for recent commits

Rebase seems good.