fix(@angular/build): add timestamp to bundle generation log #8636

Job	Run time
lint	2m 14s
build	3m 48s
build-e2e-windows	4m 13s
test	6m 24s
Browser Compatibility Tests	6m 24s
publish-snapshots	5m 35s
e2e-windows (windows-2025, 22, npm, 1)	5m 59s
e2e-windows (windows-2025, 22, npm, 2)	6m 1s
e2e-windows (windows-2025, 22, npm, 5)	6m 1s
e2e-windows (windows-2025, 22, npm, 0)	6m 6s
e2e-windows (windows-2025, 22, npm, 3)	6m 5s
e2e-windows (windows-2025, 22, esbuild, 1)	5m 52s
e2e-windows (windows-2025, 22, esbuild, 5)	6m 1s
e2e-windows (windows-2025, 22, npm, 4)	6m 2s
e2e-windows (windows-2025, 22, esbuild, 2)	6m 2s
e2e-windows (windows-2025, 22, esbuild, 4)	6m 1s
e2e-windows (windows-2025, 22, esbuild, 3)	6m 1s
e2e-windows (windows-2025, 22, esbuild, 0)	6m 1s
e2e-snapshots	1s
e2e-package-managers	1s
e2e	1s
	1h 40m 53s

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