Make sure metadata exists in the generated test AO2D

[ktf]

No description provided.

[alibuild]

Error while checking build/O2/fullCI_slc9 for 821f903 at 2026-04-24 20:47:

## sw/BUILD/O2-full-system-test-latest/log
command /sw/slc9_x86-64/O2/slc9_x86-64-slc9_x86-64-local17/prodtests/full-system-test/dpl-workflow.sh had nonzero exit code 128
[ERROR] Workflow crashed - PID 13405 (internal-dpl-aod-writer) did not exit correctly however it's not clear why. Exit code forced to 128.
[ERROR]  - Device internal-dpl-aod-writer: pid 13405 (exit 128)
[ERROR] SEVERE: Device internal-dpl-aod-writer (13405) returned with 128

Full log here.

[ktf]

Error unrelated, merging.