chore(deps): update dependency ember-qunit to v8 (#849) #2207

Job	Run time
Tests (Floating Dependencies)	1m 25s
Lint Test App	37s
embroider-optimized - Allowed to fail	1m 15s
ember-beta - Allowed to fail	1m 32s
ember-canary - Allowed to fail	1m 58s
Tests (ember-4.0, false)	1m 22s
Tests (ember-lts-4.4, false)	1m 49s
Tests (ember-lts-4.8, false)	1m 10s
Tests (ember-4.12, false)	1m 4s
Tests (ember-default, false)	1m 29s
Tests (ember-release, false)	1m 32s
Tests (embroider-safe, false)	1m 28s
Lint Addon	32s
	17m 13s

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