CI/CD: Release based updates are not deleting after the merge

[denis-tingaikin]

Expected Behavior

When the update from the repository has been merged, the branch should be deleted.

Current Behavior

After the merge, the release update brnach is still existing. 

Example

Update: #11287

The branch https://github.com/networkservicemesh/deployments-k8s/tree/release/networkservicemesh/cmd-nse-simple-vl3-docker/v1.12.0-rc.2 is still exist.

See at other examples in branches, in the format "release/$repoName/$version"

[denis-tingaikin]

It seems like done. Will be reopened in case we find any issues.