Check for serviceability storage prior to executing trace/dump operations

[leochr]

Storage for serviceability is required to store the files from Trace and Dump day-2 operations.

Check whether the OpenLibertyApplication instance has the storage for serviceability enabled and configured correctly prior to executing the operation or output a better error message to configure storage for serviceability.

Current error message from executing Dump operation on an application pod that hasn't configured storage for serviceability:

Encountered error while running command: [/bin/sh -c mkdir -p /serviceability/liberty/liberty-app-sample-6fd4786c57-dm2fm && server dump --archive=/serviceability/liberty/liberty-app-sample-6fd4786c57-dm2fm/2022-05-26_17:21:11.zip --include=thread,heap,] ; Stderr: mkdir: cannot create directory ‘/serviceability’: Permission denied
; Error: command terminated with exit code 1

• The fix should be added for WLO as well