fix(@angular/build): prevent nested CSS in components #1486

Job	Run time
lint	1m 53s
build	13s
e2e_windows (windows-2025, 22, npm, 0)	41s
e2e_windows (windows-2025, 22, npm, 1)	38s
e2e_windows (windows-2025, 22, esbuild, 0)	41s
e2e_windows (windows-2025, 22, npm, 5)	37s
e2e_windows (windows-2025, 22, npm, 2)	1m 21s
e2e_windows (windows-2025, 22, npm, 4)	42s
e2e_windows (windows-2025, 22, esbuild, 2)	46s
e2e_windows (windows-2025, 22, esbuild, 5)	34s
e2e_windows (windows-2025, 22, npm, 3)	41s
e2e_windows (windows-2025, 22, esbuild, 4)	42s
e2e_windows (windows-2025, 22, esbuild, 3)	24s
e2e_windows (windows-2025, 22, esbuild, 1)	41s
e2e	0s
test	0s
publish-snapshots	0s
Browser Compatibility Tests	0s
e2e-package-managers	0s
e2e-snapshots	0s
	10m 34s

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