fix(@angular/build): force dev-server to use HTTP/1.1 when using SSR … #2399

Job	Run time
lint	1m 53s
build-e2e-windows	20s
build	21s
e2e-windows	0s
Browser Compatibility Tests	0s
publish-snapshots	0s
test	0s
e2e	-1s
e2e-package-managers	-1s
e2e-snapshots	-1s
	2m 31s

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