Refactor some CI scripts #5523

Job	Run time
Skip Duplicate Jobs Pre Job	5s
Self-check on Python 3.8 - Python 3.8	7m 43s
Lint Checks (black, flake8, etc.) - Python 3.8	2m 4s
Pack Tests - Python 3.8	2m 45s
Compile (pip deps, pylint, etc.) - Python 3.8	3m 33s
Integration Tests (chunk 1) - Python 3.8	5m 14s
Lint Checks (black, flake8, etc.) - Python 3.9	2m 1s
Integration Tests (chunk 2) - Python 3.8	5m 44s
Compile (pip deps, pylint, etc.) - Python 3.9	3m 50s
Pack Tests - Python 3.9	2m 48s
Unit Tests (chunk 1) - Python 3.8	7m 0s
Integration Tests (chunk 1) - Python 3.9	4m 54s
Unit Tests (chunk 2) - Python 3.8	5m 37s
Integration Tests (chunk 2) - Python 3.9	6m 22s
Unit Tests (chunk 1) - Python 3.9	7m 4s
Unit Tests (chunk 2) - Python 3.9	5m 48s
Slack notification for failed master builds	2s
	1h 12m 34s

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