test(@angular/build): remove isViteRun from dev-server test harness #9904

Job	Run time
build	1m 58s
build-e2e-windows	2m 25s
lint	1m 56s
test	2m 48s
publish-snapshots	2m 49s
Browser Compatibility Tests	2m 48s
e2e-windows (24, esbuild, 3)	2m 17s
e2e-windows (24, esbuild, 4)	2m 17s
e2e-windows (24, esbuild, 0)	2m 18s
e2e-windows (24, webpack, 2)	2m 7s
e2e-windows (24, webpack, 1)	2m 18s
e2e-windows (24, esbuild, 2)	2m 18s
e2e-windows (24, esbuild, 1)	2m 17s
e2e-windows (24, webpack, 3)	2m 20s
e2e-windows (24, webpack, 5)	2m 18s
e2e-windows (24, webpack, 4)	2m 18s
e2e-windows (24, esbuild, 5)	2m 16s
e2e-windows (24, webpack, 0)	2m 17s
e2e	1s
e2e-snapshots	1s
e2e-package-managers	1s
	42m 8s

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