fix(@angular/build): pass `preserveSymlinks` option to Karma esbuild … #921

Job	Run time
list	30s
workflow (build-unit-tests)	2m 25s
workflow (devkit-core-tests-rerun)	1m 36s
workflow (build-cli)	1m 32s
workflow (devkit-core-tests)	1m 46s
workflow (modules-builder-tests)	1m 56s
	9m 45s

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