Merge changes from topic "soong-tests-presubmit" into main

* changes:
  Add script to run Soong tests with go tools
  Disable TestVariantSingletonModule when go test -short is used
  Fix data race in propagateRROEnforcementMutator
  Fix data race in finder_test.go
  Fix data race in dex_bootjars
  Fix race CommonGlobalCflags when running tests in parallel.
  Fix data race in snapshot singletons when running parallel tests