Add @glimmer/component and @ember/test-waiters #894

Job	Run time
Tests: Type Check	16s
Lint JS	17s
Slow tests: typescript with npm	21s
Tests (addon-location)	53s
Slow tests: defaults with npm	25s
Slow tests: typescript with yarn	1m 22s
Tests (test-app-location)	1m 3s
Slow tests: defaults with yarn	1m 33s
Slow tests: typescript with pnpm	1m 17s
Tests (addon-only)	25s
Slow tests: defaults with pnpm	53s
Tests (monorepo with npm)	18s
Tests (monorepo with yarn)	1m 3s
Tests (monorepo with pnpm)	41s
Tests (rollup-build)	58s
Tests (declarations-configuration)	31s
	12m 16s

Provide feedback