fix(@angular/build): favor istanbul coverage provider when browser te… #10753

Job	Run time
build	4m 0s
lint	2m 14s
build-e2e-windows	4m 34s
test	11m 6s
Browser Compatibility Tests	11m 6s
publish-snapshots	5m 28s
e2e-windows (24, esbuild, 4)	10m 30s
e2e-windows (24, esbuild, 5)	10m 28s
e2e-windows (24, esbuild, 3)	10m 30s
e2e-windows (24, esbuild, 1)	10m 29s
e2e-windows (24, webpack, 1)	10m 29s
e2e-windows (24, webpack, 3)	10m 33s
e2e-windows (24, esbuild, 2)	10m 30s
e2e-windows (24, webpack, 2)	10m 30s
e2e-windows (24, webpack, 0)	10m 33s
e2e-windows (24, esbuild, 0)	10m 28s
e2e-windows (24, webpack, 4)	10m 30s
e2e-windows (24, webpack, 5)	10m 34s
e2e-snapshots	1s
e2e-package-managers	1s
e2e	1s
	2h 44m 35s

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