chore: add docs about different type of roles #932

Job	Run time
Run Atlas tests	2h 0m 56s
Run Atlas tests	1m 31s
Run MongoDB tests (ubuntu-latest)	1m 25s
Run MongoDB tests (ubuntu-latest)	1m 25s
Run MongoDB tests (macos-latest)	1m 17s
Run MongoDB tests (macos-latest)	1m 17s
Run MongoDB tests (windows-latest)	5m 19s
Run MongoDB tests (windows-latest)	5m 19s
Report Coverage	29s
Report Coverage	45s
	2h 19m 43s

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