Investigate dropping privileged: true and explore alternatives

[vjayaramrh]

There is usage of privileged: true in the below files, investigate if it can be dropped and are able to use a specific linux capability instead.

https://github.com/nephio-project/catalog/blob/main/workloads/oai/pkg-example-ue-bp-40mhz/oai-ue/uedeployment.yaml#L30
https://github.com/nephio-project/catalog/blob/main/infra/capi/cluster-capi-infrastructure-docker/cluster-api-infrastructure-docker.yaml#L2151
https://github.com/nephio-project/catalog/blob/main/infra/capi/multus/multus-daemonset-thick.yml#L165
https://github.com/nephio-project/catalog/blob/main/infra/capi/multus/multus-daemonset-thick.yml#L198

cc: @efiacor @arora-sagar @gvbalaji @nyrahul