Rename Runtime Groups to Control Plane

[mheap]

Is there an existing issue for this?

• I have searched the existing issues

Problem Statement

The Runtime Group terminology is being phased out in support of Control Plane in Konnect

Proposed Solution

• Replace all usage of the term Runtime Group in public facing configuration/logs with Control Plane
• Replace the path ~/kic/api/runtime_groups/(?<rgid>\S+?)/(?<path>\S+) with ~/kic/api/control_planes/(?<rgid>\S+?)/(?<path>\S+)
• Replace the path ~/kic/api/runtime_groups/(?<rgid>\S+?)/oauth2 with ~/kic/api/control_planes/(?<rgid>\S+?)/oauth2

Additional information

Refactoring internal method names away from Runtime Group is optional, but recommended

Acceptance Criteria

• konnect-runtime-group-id CLI flag is deprecated, konnect-control-plane-id is introduced instead
• internal/konnect/runtimegroups package uses ControlPlane naming instead of RuntimeGroup for its types and functions
• tests and test helpers do not use RuntimeGroup term
• internal/dataplane/sendconfig package does not use RuntimeGroup term

[mflendrich]

Reopening to determine the scope of the remaining work (at least check if log prints, flag names, or as @randmonkey pointed out - object names in the code) need changing.
Then please put them in the ACs and shepherd this effort through completion.