fix(@angular/cli): fix sourceRoot resolution for MCP projects tool #1847

Job	Run time
list	26s
workflow (devkit-core-tests)	30s
workflow (devkit-core-tests-rerun)	28s
workflow (build-unit-tests)	29s
workflow (build-cli)	28s
workflow (modules-builder-tests)	30s
	2m 51s

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