Dump artifacts offending path reqs into a file

Dump offending artifacts into a file that can be inspected after a
build regardless of whether path requirements are enforced or not.

This makes it easier to track progress for products not yet ready
to enable enforcement.

Bug: 80410283
Test: lunch mainline_arm64; m out/target/product/generic_arm64/offending_artifacts.txt
Change-Id: Id05fbf256edf3689ab0b9851b34658d6d84939b2