fix(@angular/build): show unit-test error for missing vitest browser … #1558

Job	Run time
build	12s
lint	2m 20s
e2e_windows (windows-2025, 22, npm, 0)	38s
e2e_windows (windows-2025, 22, npm, 2)	1m 14s
e2e_windows (windows-2025, 22, npm, 3)	1m 11s
e2e_windows (windows-2025, 22, npm, 5)	27s
e2e_windows (windows-2025, 22, npm, 1)	1m 10s
e2e_windows (windows-2025, 22, esbuild, 2)	41s
e2e_windows (windows-2025, 22, npm, 4)	38s
e2e_windows (windows-2025, 22, esbuild, 3)	30s
e2e_windows (windows-2025, 22, esbuild, 5)	34s
e2e_windows (windows-2025, 22, esbuild, 0)	33s
e2e_windows (windows-2025, 22, esbuild, 4)	45s
e2e_windows (windows-2025, 22, esbuild, 1)	1m 11s
test	0s
publish-snapshots	0s
Browser Compatibility Tests	0s
e2e-package-managers	0s
e2e	0s
e2e-snapshots	0s
	12m 4s

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