Use addon-dev declarations plugin for d.ts output #876

Job	Run time
Slow tests: defaults with npm	1m 58s
Tests (addon-location)	56s
Tests: Type Check	12s
Slow tests: defaults with yarn	1m 25s
Lint JS	21s
Tests (test-app-location)	52s
Slow tests: defaults with pnpm	54s
Tests (addon-only)	26s
Slow tests: typescript with npm	1m 59s
Tests (monorepo with npm)	1m 39s
Slow tests: typescript with yarn	58s
Tests (monorepo with yarn)	1m 6s
Slow tests: typescript with pnpm	50s
Tests (monorepo with pnpm)	47s
Tests (rollup-build)	35s
Tests (declarations-configuration)	32s
	15m 30s

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