fix(@angular/build): correctly handle `false` value in server option #1439

Job	Run time
lint	2m 0s
build	14s
e2e_windows (windows-2025, 22, npm, 0)	34s
e2e_windows (windows-2025, 22, esbuild, 0)	21s
e2e_windows (windows-2025, 22, npm, 4)	36s
e2e_windows (windows-2025, 22, esbuild, 3)	39s
e2e_windows (windows-2025, 22, esbuild, 2)	36s
e2e_windows (windows-2025, 22, esbuild, 4)	35s
e2e_windows (windows-2025, 22, npm, 5)	21s
e2e_windows (windows-2025, 22, npm, 2)	35s
e2e_windows (windows-2025, 22, esbuild, 5)	33s
e2e_windows (windows-2025, 22, npm, 3)	20s
e2e_windows (windows-2025, 22, esbuild, 1)	37s
e2e_windows (windows-2025, 22, npm, 1)	38s
publish-snapshots	0s
test	0s
e2e	0s
e2e-package-managers	0s
Browser Compatibility Tests	0s
e2e-snapshots	0s
	8m 39s

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