The PR validation workflow now enforces that every PR with an 'impact/*'
label must also have a corresponding 'kind/*' label, in addition to the
existing 'area/*' label requirement.
This change helps ensure proper categorization of pull requests by
requiring contributors to specify both the impact area and the kind of
change being made.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>