refactor(@angular/build): provide a default for the ng-packagr projec… #1458

Job	Run time
lint	2m 3s
build	17s
e2e_windows (windows-2025, 22, npm, 1)	1m 1s
e2e_windows (windows-2025, 22, npm, 3)	43s
e2e_windows (windows-2025, 22, npm, 2)	43s
e2e_windows (windows-2025, 22, esbuild, 0)	39s
e2e_windows (windows-2025, 22, npm, 4)	42s
e2e_windows (windows-2025, 22, npm, 5)	43s
e2e_windows (windows-2025, 22, esbuild, 1)	20s
e2e_windows (windows-2025, 22, esbuild, 2)	26s
e2e_windows (windows-2025, 22, npm, 0)	34s
e2e_windows (windows-2025, 22, esbuild, 5)	1m 25s
e2e_windows (windows-2025, 22, esbuild, 4)	43s
e2e_windows (windows-2025, 22, esbuild, 3)	24s
Browser Compatibility Tests	0s
test	0s
publish-snapshots	0s
e2e	-1s
e2e-package-managers	-1s
e2e-snapshots	-1s
	10m 40s

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