Replay progress events in unit tests (#1017) #2316

Job	Run time
Lint addon	26s
Tests - Floating Dependencies	55s
Tests	43s
Typecheck [email protected]	45s
Typecheck [email protected]	41s
Typecheck [email protected]	1m 12s
Tests - ember-3.25	1m 15s
Tests - ember-lts-3.28	1m 1s
Tests - ember-release	1m 43s
Tests - ember-beta	1m 31s
Tests - ember-canary	1m 23s
Tests - embroider-safe	1m 6s
Tests - embroider-optimized	1m 2s
	13m 43s

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