Add artifact path requirement support to Starlark

Artifact path requirements requires setting some new variables,
and also dumping the state of the product config variables
after evaluating partial products that set artifact path requirements.

Bug: 188079133
Test: Removed the code that disabled artifacts path requirements from the rbc dashboard script,
      and verified that it was still green for aosp_arm64
Change-Id: I228e35285d788f4c83aa695c0f28b7c7db02544c