Add support for standalone activity cancellation #16595

Job	Run time
Pre-build for cache	3m 0s
Set up single test	25s
Misc checks	6m 19s
Integration test	9m 23s
Unit test	8m 21s
Functional test xdc (cass_es8)	11m 11s
Functional test xdc (cass_es)	11m 36s
Functional test xdc (postgres12_pgx)	12m 44s
Functional test ndc (cass_es)	3m 21s
Functional test xdc (postgres12)	12m 15s
Functional test ndc (mysql8)	4m 41s
Functional test xdc (cass_os2)	12m 23s
Functional test ndc (cass_os2)	5m 5s
Functional test xdc (mysql8)	13m 30s
Functional test ndc (cass_es8)	3m 26s
Functional test ndc (postgres12_pgx)	4m 56s
Functional test ndc (postgres12)	4m 31s
Functional test (cass_es8, shard 1)	14m 15s
Functional test (cass_es, shard 2)	15m 9s
Functional test (cass_es, shard 0)	13m 44s
Functional test (cass_es8, shard 2)	13m 52s
Functional test (cass_os2, shard 1)	19m 43s
Functional test (cass_es, shard 1)	13m 55s
Functional test (sqlite, shard 2)	16m 49s
Functional test (sqlite, shard 0)	19m 3s
Functional test (cass_es8, shard 0)	14m 59s
Functional test (postgres12, shard 0)	14m 41s
Functional test (cass_os2, shard 0)	18m 10s
Functional test (mysql8, shard 1)	18m 41s
Functional test (postgres12, shard 1)	16m 37s
Functional test (cass_os2, shard 2)	21m 23s
Functional test (mysql8, shard 0)	16m 29s
Functional test (mysql8, shard 2)	15m 59s
Functional test (postgres12, shard 2)	16m 31s
Functional test (postgres12_pgx, shard 1)	15m 32s
Functional test (sqlite, shard 1)	17m 53s
Functional test (postgres12_pgx, shard 2)	17m 24s
Functional test (postgres12_pgx, shard 0)	14m 26s
Test Status	2s
	7h 52m 24s

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