Merge "Add metadata generator tool for test spec metadata generation. Bug:...

Merge "Add metadata generator tool for test spec metadata generation. Bug: 296873595 Test: Manual test (use go test inside tools/metadata/testdata)" into main am: 4277d617

Original change: https://android-review.googlesource.com/c/platform/build/+/2815214



Change-Id: I23419ea04ee69275aad70e6e485d33dd7ff6c9b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>