Closes #6300 #4507

Job	Run time
Dependency Validation	11s
Coding Guidelines	28s
Type Checker	29s
Unit Tests (ubuntu-latest, 8.2)	15s
Unit Tests (ubuntu-latest, 8.1)	16s
Unit Tests (ubuntu-latest, 8.3)	17s
Unit Tests (ubuntu-latest, 8.4)	14s
Unit Tests (windows-latest, 8.3)	42s
Unit Tests (ubuntu-latest, 8.5)	17s
Unit Tests (windows-latest, 8.2)	34s
Unit Tests (windows-latest, 8.4)	34s
Unit Tests (windows-latest, 8.1)	37s
Unit Tests (windows-latest, 8.5)	1m 3s
End-to-End Tests (ubuntu-latest, 8.4)	46s
End-to-End Tests (ubuntu-latest, 8.1)	42s
End-to-End Tests (ubuntu-latest, 8.2)	43s
End-to-End Tests (windows-latest, 8.4)	1m 44s
End-to-End Tests (windows-latest, 8.1)	1m 45s
End-to-End Tests (ubuntu-latest, 8.3)	38s
End-to-End Tests (ubuntu-latest, 8.5)	40s
End-to-End Tests (windows-latest, 8.3)	1m 46s
End-to-End Tests (windows-latest, 8.5)	1m 45s
End-to-End Tests (windows-latest, 8.2)	1m 45s
Build PHAR	33s
Code Coverage	2m 15s
Test PHAR (8.1, pcov)	22s
Test PHAR (8.2, xdebug)	32s
Test PHAR (8.1, xdebug)	33s
Test PHAR (8.3, xdebug)	34s
Test PHAR (8.4, xdebug)	38s
Test PHAR (8.3, pcov)	17s
Test PHAR (8.2, pcov)	18s
Test PHAR (8.4, pcov)	17s
Test PHAR (8.5, pcov)	17s
Test PHAR (8.5, xdebug)	33s
	25m 20s

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