Add details and template for pull request process #2181

Job	Run time
Python Unittests (bionic-3.8, 3.8, tests)	16m 29s
Python Unittests (bionic-3.8, 3.8, tests_nds)	15m 26s
Python Unittests (focal-3.8, 3.8, tests)	17m 38s
Python Unittests (focal-3.8, 3.8, tests_nds)	14m 27s
Build 18.04 package	5m 13s
Build 20.04 package	6m 14s
Build docker image	7m 49s
Tests E2E 20.04	12m 52s
Tests E2E docker	11m 13s
Publish (on release only)	0s
	1h 47m 21s

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