[Local Storage Operator] must-gather image name incorrect 
According to official documentation gathering the local storage operator data failed of "ImagePullBackOff"

https://docs.openshift.com/container-platform/4.15/support/gathering-cluster-data.html

  4.15.z   

    Always

    1. Install Openshift cluster with 4.15 nightly build
    2. Intstall local storage operator
    3. According to 4.15 official documentation gathering the local storage operator data 
    

    In step 3: Gathering the local storage operator data failed of "ImagePullBackOff"

$ oc adm must-gather  --kubeconfig=/home/jenkins/ws/workspace/ocp-common/Runner/workdir/ocp4_admin.kubeconfig  --dest-dir=/tmp/lso-gather --image=registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel8:v4.15
Error running must-gather collection: gather did not start for pod must-gather-w76tv: unable to pull image: ImagePullBackOff: Back-off pulling image "registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel8:v4.15"

    In step3, Gathering the local storage operator data should succeed

    In 4.15 above, we use the rhel9 as build base image, the local storage mustgather image name should be change from

"registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel8:v<installed_version_LSO>"
 to 
"registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel9:v<installed_version_LSO>"


$ docker pull registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel8:v4.15
Error response from daemon: manifest for registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel8:v4.15 not found: manifest unknown: manifest unknown
$ docker pull registry.redhat.io/openshift4/ose-local-storage-mustgather-rhel9:v4.15
v4.15: Pulling from openshift4/ose-local-storage-mustgather-rhel9
ca1636478fe5: Downloading [>                                                  ]  539.4kB/78.17MB
5e209a73b99c: Pulling fs layer
df57bd50942f: Pulling fs layer
3c74716383b7: Waiting