Use principal to classify system workers #26160

Job	Run time
Test setup	15s
Pre-build for cache	1m 40s
Mixed brain test	8m 6s
Integration test	4m 14s
Misc checks	4m 27s
Unit test	6m 13s
Functional test (cass_os3, smoke)	3m 59s
Functional test (cass_es8, smoke)	3m 54s
Functional test (postgres12, shard1)	13m 39s
Functional test (postgres12, shard0)	17m 59s
Functional test (cass_es, shard2)	17m 28s
Functional test (sqlite, smoke)	2m 44s
Functional test (cass_es, xdc)	10m 4s
Functional test (cass_es, shard0)	17m 51s
Functional test (postgres12, shard2)	10m 54s
Functional test (cass_es, ndc)	3m 28s
Functional test (postgres12, xdc)	9m 7s
Functional test (cass_es, shard1)	16m 34s
Functional test (cass_os2, smoke)	3m 54s
Functional test (postgres12, ndc)	3m 11s
Functional test (mysql8, smoke)	3m 17s
Functional test (postgres12_pgx, smoke)	3m 10s
Test Status	3s
Notify Slack on Failure	0s
	2h 46m 11s

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