release-22.1:Backport!6272

Merged Andrey Vertiprahov requested to merge cherry-pick-ef62aadf into release-22.1

Add migrate is_regex to is_matching field in Label.

See merge request !6272 (merged)

(cherry picked from commit ef62aadf)

e0b4c5ca Add migrate is_regex to is_matching field in Label.

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