e2e flake: timeout deleting volsync-test-file after successful test

[nirs]

We see this randomly in the CI, typically very rarely, but recently we see more and more failures.

When it happened locally, the issue was that volsync deleted the cephfs snapshot, but the snapshot was never deleted.

When this happens retrying the e2e job will continue to fail since we use the same namespace and resource names in the next run.

Fixing the cluster require manual cleanup. I think removing the finalizer on the volumesnapshot was enough, but I did not check if there are no leftovers on in cephfs.

Example error:

drenv.commands.Error: Command failed:
   command: ('addons/volsync/test', 'dr1', 'dr2')
   exitcode: 1
   error:
      Traceback (most recent call last):
        File "/home/github/actions-runner/_work/ramen/ramen/test/addons/volsync/test", line 259, in <module>
          t.result()
        File "/usr/lib64/python3.12/concurrent/futures/_base.py", line 449, in result
          return self.__get_result()
                 ^^^^^^^^^^^^^^^^^^^
        File "/usr/lib64/python3.12/concurrent/futures/_base.py", line 401, in __get_result
          raise self._exception
        File "/usr/lib64/python3.12/concurrent/futures/thread.py", line 58, in run
          result = self.fn(*self.args, **self.kwargs)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/github/actions-runner/_work/ramen/ramen/test/addons/volsync/test", line 243, in test
          teardown(cluster1, cluster2, variant)
        File "/home/github/actions-runner/_work/ramen/ramen/test/addons/volsync/test", line 223, in teardown
          kubectl.wait(
        File "/home/github/actions-runner/_work/ramen/ramen/test/drenv/kubectl.py", line [144](https://github.com/RamenDR/ramen/actions/runs/11955746683/job/33338240384?pr=1548#step:7:145), in wait
          _watch("wait", *args, context=context, log=log)
        File "/home/github/actions-runner/_work/ramen/ramen/test/drenv/kubectl.py", line 216, in _watch
          for line in commands.watch(*cmd, input=input):
        File "/home/github/actions-runner/_work/ramen/ramen/test/drenv/commands.py", line 207, in watch
          raise Error(args, error, exitcode=p.returncode)
      drenv.commands.Error: Command failed:
         command: ('kubectl', 'wait', '--context', 'dr2', 'ns', 'volsync-test-file', '--for=delete', '--timeout=120s')
         exitcode: 1
         error:
            error: timed out waiting for the condition on namespaces/volsync-test-file

Failed builds:

• https://github.com/RamenDR/ramen/actions/runs/11955746683/job/33338240384?pr=1548
• https://github.com/RamenDR/ramen/actions/runs/11955746683/job/33328843652?pr=1548
• https://github.com/RamenDR/ramen/actions/runs/11978783117/job/33399532029
• https://github.com/RamenDR/ramen/actions/runs/11988816757/job/33424509731