[wip] feat: drupal 11 support #541

Job	Run time
tests / Install LocalGov Drupal (3.x, ~10.0, 8.1)	1m 59s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.2)	1m 41s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.3)	1m 9s
tests / Install LocalGov Drupal (3.x, ~10.0, 8.4)	1m 11s
tests / Install LocalGov Drupal (3.x, ~11.0, 8.3)	1m 14s
tests / Install LocalGov Drupal (3.x, ~11.0, 8.4)	1m 46s
tests / ESLint javascript checks (3.x, ~10.0, 8.4)	5s
tests / PHP coding standards checks (3.x, ~10.0, 8.4)	15s
tests / Stylelint checks (3.x, ~10.0, 8.4)	10s
tests / PHP static analysis checks (3.x, ~10.0, 8.4)	13s
tests / ESLint yaml checks (3.x, ~10.0, 8.4)	46s
tests / PHPUnit tests (3.x, ~10.0, 8.1)	3m 32s
tests / PHPUnit tests (3.x, ~10.0, 8.2)	3m 35s
tests / PHPUnit tests (3.x, ~10.0, 8.3)	3m 37s
tests / PHPUnit tests (3.x, ~10.0, 8.4)	2m 17s
tests / PHPUnit tests (3.x, ~11.0, 8.3)	1m 54s
tests / PHPUnit tests (3.x, ~11.0, 8.4)	1m 49s
	27m 13s

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