Upgrade to go 1.19

Developer story

As a WMCO/WMCB, I want the operator binaries to be built using go 1.19 to match rest of the OpenShift and k8s components.

Engineering Details

go.mod and .ci-operator.yaml needs to be updated. If any changes are needed to be reflected in the CPaaS pipeline, then that should be accounted for also.

Acceptance Criteria

WMCB binary and WMCO image are built using go 1.19 in dev, CI and prod.

WMCO and WMCB Dockerfiles are updated to build using go 1.19 image.