Add the new kubevirt-migration-operator to the csv-merger and the manifest-templator tools.

Implementation details:
1. edit the tools/util/csv_with_component.go file to add the csv required flags for the new component:

• --migration-operator-csv
• --migration-operator-csv-file

2. add optional new object to the csvWithComponent slice, for the "MigrationOperator" component.

3. add the --migration-operator-version, both in tools/manifest-templator/manifest-templator.go and in tools/csv-merger/csv-merger.go (follow one of the other component version flags, to see how to use it. e.g. "cnao-version".