Support SparkIntegration activation after SparkContext created #371

Job	Run time
Tasks (latest) (3.6, ubuntu-20.04)	1m 21s
Tasks (latest) (3.7, ubuntu-20.04)	2m 19s
Tasks (latest) (3.8, ubuntu-20.04)	3m 46s
Tasks (latest) (3.10, ubuntu-20.04)	3m 6s
Tasks (latest) (3.11, ubuntu-20.04)	3m 21s
Tasks (latest) (3.12, ubuntu-20.04)	5m 26s
Tasks (latest) (3.13, ubuntu-20.04)	5m 1s
Tasks (pinned) (3.6, ubuntu-20.04)	3m 31s
Tasks (pinned) (3.7, ubuntu-20.04)	3m 58s
Tasks (pinned) (3.8, ubuntu-20.04)	4m 29s
Tasks (pinned) (3.9, ubuntu-20.04)	2m 11s
Tasks (pinned) (3.10, ubuntu-20.04)	4m 16s
Tasks (pinned) (3.11, ubuntu-20.04)	5m 5s
Tasks (pinned) (3.12, ubuntu-20.04)	4m 11s
All pinned Tasks tests passed	1s
	52m 2s

Provide feedback