Use shared GitHub workflows to run tests #498

Job	Run time
tests / Install LocalGov Drupal (3.x, ~10.0, 8.1)	1m 36s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.1)	1m 36s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.2)	1m 24s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.2)	1m 24s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.3)	1m 24s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.3)	1m 24s
tests / Coding standards checks (3.x, ~10.0, 8.3)	8s
tests / Coding standards checks (3.x, ~10.0, 8.3)	8s
tests / Static analysis checks (3.x, ~10.0, 8.3)	13s
tests / Static analysis checks (3.x, ~10.0, 8.3)	13s
tests / PHPUnit tests (3.x, ~10.0, 8.1)	1m 39s
tests / PHPUnit tests (3.x, ~10.0, 8.1)	1m 34s
tests / PHPUnit tests (3.x, ~10.0, 8.2)	1m 37s
tests / PHPUnit tests (3.x, ~10.0, 8.2)	1m 42s
tests / PHPUnit tests (3.x, ~10.0, 8.3)	1m 43s
tests / PHPUnit tests (3.x, ~10.0, 8.3)	1m 45s
	19m 30s

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