fix(rolling_upgrade): add azure region name param to getJenkinsLabels
fix(rolling_upgrade): add azure region name param to getJenkinsLabels

This commit adds the azure_region_name param to the rolling upgrade
pipeline. Without this param the pipeline would use any available
builder in Jenkins, which sometimes ends up with us running on cloud
team's builders, which are configured differently from ours. This in
turn leads to failures of our hydra commands. After the commit we
should only run on QA builders.

scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests