CI/CD concurrency

[V3lop5]

Describe the bug
Failing CI/CD workflow due to concurrency

To Reproduce
See the following runs:
PR open: https://github.com/NOWUM/EnSysMod/actions/runs/1542186630
PR close: https://github.com/NOWUM/EnSysMod/actions/runs/1542186907

Expected behavior
No fails due to concurrency for all workflows.

Additional context
Following restrictions are mandatory:

• Only one SSH connection at the same time (across all deployments pr-preview, development and production)
• Workflow PR open should be cancelled immediately when PR close starts
• Workflow PR close should not crash, if no docker container for removing is found

See https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions#concurrency