[App Extensibility] Remove `retail-react-app-demo` preset in CI (@W-17597153@) #7619

Job	Run time
changelog-check	20s
lighthouse (20)	14m 32s
pwa-kit (16, 8)	14m 1s
generated-windows (retail-react-app-test-project)	8m 27s
generated (retail-react-app-test-project)	6m 2s
pwa-kit (16, 9)	13m 16s
generated-windows (retail-react-app-test-project)	8m 45s
generated (retail-react-app-test-project)	6m 1s
pwa-kit (18, 8)	12m 51s
generated-windows (express-minimal-test-project)	7m 1s
pwa-kit-windows (16, 8)	16m 12s
generated (express-minimal-test-project)	4m 3s
pwa-kit (18, 9)	12m 25s
generated-windows (typescript-minimal-test-project)	6m 24s
pwa-kit-windows (16, 9)	17m 0s
generated (typescript-minimal-test-project)	4m 19s
pwa-kit (18, 10)	13m 20s
pwa-kit-windows (18, 8)	13m 47s
pwa-kit (20, 8)	13m 21s
pwa-kit-windows (18, 9)	16m 54s
pwa-kit (20, 9)	11m 38s
pwa-kit-windows (18, 10)	13m 40s
pwa-kit (20, 10)	11m 38s
pwa-kit-windows (20, 8)	14m 18s
pwa-kit-windows (20, 9)	13m 42s
pwa-kit-windows (20, 10)	14m 40s
	4h 48m 37s

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