Migration of applicable_licenses to package_metadata.

Data gathering aspects will look for either version of the name.

After a Bazel release or two we can delete the lookup on `applicable_license`

RELNOTES: None
PiperOrigin-RevId: 579835543
Change-Id: I9b962dd41d4c318081ac2a891d2ec53892d48e3e

tools/compliance/gather_packages.bzl

@@ -150,6 +150,12 @@ def gather_package_common(target, ctx, provider_factory, metadata_providers, fil
  licenses.append(dep[LicenseInfo])
  if PackageInfo in dep:
  package_info.depend(dep[LicenseInfo])
+ elif hasattr(ctx.rule.attr, "package_metadata"):
+ for dep in ctx.rule.attr.package_metadata:
+ if LicenseInfo in dep:
+ licenses.append(dep[LicenseInfo])
+ if PackageInfo in dep:
+ package_info.depend(dep[LicenseInfo])
 
  # Record all the external repos anyway.
  target_name = str(target.label)