refactor(@angular/build): encapsulate TypeScript source file AST cach… #10990

Job	Run time
build	1m 18s
lint	1m 18s
build-e2e-windows	1m 19s
e2e-windows	1s
publish-snapshots	1s
Browser Compatibility Tests	1s
test	1s
e2e	1s
e2e-snapshots	1s
e2e-package-managers	1s
	4m 2s

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