fix(@angular/ssr): improve locale handling in app-engine #9075

Job	Run time
build-e2e-windows	4m 45s
lint	2m 20s
build	4m 18s
publish-snapshots	2m 57s
Browser Compatibility Tests	2m 57s
test	2m 58s
e2e-windows (windows-2025, 22, npm, 5)	2m 30s
e2e-windows (windows-2025, 22, esbuild, 2)	2m 34s
e2e-windows (windows-2025, 22, npm, 2)	2m 26s
e2e-windows (windows-2025, 22, npm, 3)	2m 31s
e2e-windows (windows-2025, 22, npm, 1)	2m 32s
e2e-windows (windows-2025, 22, npm, 0)	2m 30s
e2e-windows (windows-2025, 22, esbuild, 5)	2m 25s
e2e-windows (windows-2025, 22, esbuild, 1)	2m 33s
e2e-windows (windows-2025, 22, esbuild, 3)	2m 32s
e2e-windows (windows-2025, 22, esbuild, 4)	2m 31s
e2e-windows (windows-2025, 22, npm, 4)	2m 32s
e2e-windows (windows-2025, 22, esbuild, 0)	2m 30s
e2e-snapshots	1s
e2e-package-managers	1s
e2e	1s
	50m 24s

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