Convert to V2 Addon, drop support for ember-source < v4 #2670

Job	Run time
Tests	1m 4s
Floating Dependencies	36s
Lint	42s
typescript@5.0	44s
typescript@5.1	44s
typescript@5.2	44s
typescript@5.3	45s
typescript@5.4	50s
Try: ember-lts-3.16 @ test-apps/base-tests	44s
Try: ember-lts-3.28 @ test-apps/base-tests	1m 5s
Try: ember-lts-4.12 @ test-apps/base-tests	53s
Try: ember-lts-5.12 @ test-apps/base-tests	52s
Try: ember-release @ test-apps/base-tests	48s
Try: ember-beta @ test-apps/base-tests	47s
Try: ember-canary @ test-apps/base-tests	54s
	12m 12s

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