Add more tests and add back validation for some agents #2630

Job	Run time
CLI End to End tests	9m 5s
Unit tests (Runtime)	6m 40s
End to End tests (Python, python)	20m 29s
Unit tests (Runtime IT)	18m 30s
End to End tests (Other, other)	19m 4s
Unit tests (Deployer)	7m 55s
Unit tests (Api Gateway)	4m 16s
Unit tests (Control plane)	4m 37s
Unit tests (Other)	11m 23s
Unit tests (Style)	6m 24s
	1h 48m 23s

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