Deprecate HandlerMappingIntrospectorRequestTransformer #8075

Job	Run time
Check Samples	7m 35s
Build (ubuntu-latest, 17) / Build	11m 5s
Build (windows-latest, 17) / Build	16m 55s
Test Against Snapshots (17, 17) / Test	9m 11s
Test Against Snapshots (21-ea, 21) / Test	8m 37s
Deploy Schema / Deploy Schema	53s
Deploy Artifacts / Deploy Artifacts	2m 10s
Deploy Docs / Deploy Docs	1m 29s
Perform Release / Perform Release	0s
Send Notification	3s
	57m 58s

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