Use temporary XRootD patch to fix segfault in tape server

Summary

• Updates the XRootD version to 5.8.1.post48+git845be267c-1. This includes the fix for the segfault in the tape server. We will get a new XRootD version very soon that this fix will be part of. Until then, we will keep use this particular fix.
• While working on this, I quickly added a deploy.sh script that calls create_instance.sh with some reasonable default so that it is easier to spawn an instance for a given instance.
• I also found a few minor Valgrind issues in DriveGeneric.cpp that were fixed
• Finally there are also a few very minor SonarCloud issues

As soon as the new XRootD version is available, we should upgrade and re-enable the cta-release test

Additional Required Actions

• Requires manual tests in pre-production: NO
• Requires a documentation update: NO

References

Closes #1099 (closed)

.gitlab/ci/tests.gitlab-ci.yml

@@ -145,6 +145,10 @@ unit-test-oracle:
   resource_group: oracle-centralized-db-cta-dev04
 
 test-cta-release:
+  # We could solve this by putting the XRootD testing repo in the public repos, but I would rather not
+  # It's good to have an indicator that we cannot do a release yet, so for now we will just allow failure
+  # Until we get a stable XRootD version again
+  allow_failure: true
   stage: test
   needs:
     - job: build-cta-rpm