Integrate the Nephio operators for Cloud RAN into Nephio build and end-to-end testing

[liamfallon]

In R4 the Cloud RAN operators in Nephio are not included in the overall nephio make-based build process. For example, the O2 IMS operator code is written in python and is built separately. In addition, there are no integration test or end to end tests performed on those operators in Nephio.

To integrate those perators properly into Nephio the following tasks are required (non-exhaustive list)

• Add the Cloud RAN operators into the Nephio build structure
• Ensure that all jobs for linting, security scanning, image pushing, and releasing work for all operators
• Add integration and end to end tests for the Cloud RAN operators to Nephio

@arora-sagar, @vjayaramrh, @dkosteck , @efiacor please elaborate and add any missing items.

We can create sub-issues in R5 to cover each of the bullets above.

[gvbalaji]

For R4 we will add one end to end test for create cluster on the IMS side.
For R5 we will add end to end test for installing FOCOM on a separate management cluster and it driving the O2 operator to create cluster.