Fix for ivas-pytest-anchor
The scheduled pipelines seem to be failing. See e.g.
- https://forge.3gpp.org/rep/sa4/audio/ivas-basop/-/pipelines/67449
- https://forge.3gpp.org/rep/sa4/audio/ivas-basop/-/pipelines/67448
- https://forge.3gpp.org/rep/sa4/audio/ivas-basop/-/pipelines/67450
Likely, the ivas-pytest-anchor should not check for the `CI_MERGE_REQUEST_TARGET_BRANCH_NAME`
@kiene, please review if this update is the correct one. I will test it in a BASOP branch too.