Make the workflows maintainable #275

Job	Run time
Lint	18s
Slow tests: try-scenarios	2m 7s
Slow tests: defaults with npm	1m 21s
Slow tests: defaults with pnpm	50s
Tests (addon-location)	14s
Tests (rollup-build)	14s
Slow tests: typescript with pnpm	54s
Slow tests: typescript with npm	2m 0s
Tests (test-app-location)	19s
Tests (monorepo with npm)	18s
Tests (monorepo with pnpm)	20s
Tests (addon-only)	19s
Tests (declarations-configuration)	36s
	9m 50s

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