Disable non-functional and deprecated package_api_docs lint (#55833)

Reference: https://github.com/dart-lang/linter/issues/5107

Author: parlough

analysis_options.yaml

@@ -134,7 +134,6 @@ linter:
     # - one_member_abstracts # too many false positives
     - only_throw_errors # this does get disabled in a few places where we have legacy code that uses strings et al
     - overridden_fields
-    - package_api_docs
     - package_names
     - package_prefixed_library_names
     # - parameter_assignments # we do this commonly