Remove deprecated bash functionality from orchestration scripts

Summary

• Removed KUBECTL_DEPRECATED_SHOWALL (literally no one should be running a kubernetes version this old)
• Replaced deprecated egrep with grep -E
• Removed some accidental output of certain commands
• Replaced deprecated -a with &&
• Replaced depreacted backtick command execution with $()
• Updated the cta-catalogue-updater image to the latest one which has less redundant log outputs and doesn't download Oracle on every step
  • See https://gitlab.cern.ch/cta/eoscta-operations/containers/cta-catalogue-updater/-/commit/e9c2097a0f307a7ab82fc854d6fcf9e54610549a and https://gitlab.cern.ch/cta/eoscta-operations/containers/cta-catalogue-updater/-/commit/283498ff49d8e2b8fd8f9e79eeea3353d9e506ac
• Improved the error message on command failure in run_systemtest.sh

There is more to do, but this is just some quick clean up that took very little time

Additional Required Actions

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

References

Closes #887 (closed)