Resolve siteId dynamically via x-site-id header for multisite #15911

Job	Run time
changelog-check	28s
lighthouse (24)	14m 53s
generated (express-minimal-test-project)	4m 42s
generated (typescript-minimal-test-project)	4m 43s
generated (retail-react-app-test-project)	10m 31s
generated (retail-react-app-demo)	6m 35s
generated-windows (express-minimal-test-project)	7m 33s
generated-windows (typescript-minimal-test-project)	8m 31s
generated-windows (retail-react-app-test-project)	15m 23s
generated-windows (retail-react-app-demo)	11m 59s
pwa-kit (20, 10)	3m 39s
pwa-kit (20, 9)	3m 44s
pwa-kit (18, 9)	4m 11s
pwa-kit-windows (18, 9)	5m 0s
pwa-kit (20, 11)	3m 50s
pwa-kit (22, 9)	3m 44s
pwa-kit (18, 10)	4m 20s
pwa-kit (22, 10)	3m 24s
pwa-kit (24, 10)	3m 18s
pwa-kit (24, 9)	3m 24s
pwa-kit-windows (24, 11)	5m 17s
pwa-kit-windows (22, 11)	5m 23s
pwa-kit-windows (24, 10)	4m 18s
pwa-kit-windows (20, 11)	8m 16s
pwa-kit-windows (22, 9)	4m 46s
pwa-kit-windows (20, 9)	5m 33s
pwa-kit-windows (24, 9)	5m 0s
pwa-kit-windows (20, 10)	4m 33s
pwa-kit (24, 11)	3m 21s
pwa-kit-windows (22, 10)	4m 13s
pwa-kit-windows (18, 10)	4m 23s
pwa-kit (22, 11)	3m 47s
	3h 2m 42s

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