Test co-existence of KServe and ModelMesh in the same NS

[heyselbi]

• that following installation sequence works: KServe --> MM
• that reverse installation sequence works: MM --> KServe
• MM+KServe: model can be deployed and inferenced with KServe
• MM+KServe: model can be deployed and inferenced with MM
• model can be deployed and inferenced with KServe after MM is uninstalled
• model can be deployed and inferenced with MM after KServe is uninstalled
• MM+KServe is uninstalled fine and re-installed again with no errors
  • model inferences with KServe and MM

[Jooho]

@vaibhavjainwiz this is the test list

[davidesalerno]

The scope of this issue is to test the KServe and MM could co-exist in the same namespace

[vaibhavjainwiz]

I faced below issue while testing the KServe and ModelMesh in same namespace:
opendatahub-io/odh-model-controller#125