update WebSphereLibertyApplication and WebSphereLibertyTrace documentation

[tam512]

1. On page https://www.ibm.com/docs/en/was-liberty/base?topic=resources-webspherelibertyapplication-custom-resource#cfg-r-crd-wl__title__2 , there should not be .spec.storage in the snippet WebSphereLibertyApplication

  storage:
    size: 2Gi
    mountPath: "/logs"

As listed in the https://www.ibm.com/docs/en/was-liberty/base?topic=resources-webspherelibertyapplication-custom-resource#cfg-r-crd-wl__title__3, there is no storage, it should be replaced with serviceability

  serviceability:
    size: 2Gi

2. On page https://www.ibm.com/docs/en/was-liberty/base?topic=resources-webspherelibertytrace-custom-resource#cfg-r-crd-wlt__trace-eg__title__1, remove "with a format such as /serviceability/namespace/pod_name/timestamp.zip" in the following line. The trace files and messages.log are not in format timestamp.zip which is generated when getting WebSphereLibertyDump.

Generated trace files, along with messages.log files, are stored in the serviceability folder with a format such as /serviceability/namespace/pod_name/timestamp.zip.