Rename qa-master to e2e-run-master

What does this MR do?

Part of Rename `qa-master` Slack channel (gitlab-org/quality/quality-engineering/team-tasks#2803 - closed)

Rename qa-master Slack channel to e2e-run-master

Check-list

• Ensure commits include Changelog: trailer
• Verify the change in all affected pipelines.

Post-merge Checklist

• A new pipeline-common version must be released
• Update pipeline-common ref to new version in GitLab
• Change the name of the Slack channel