Remove Konnect clients in client provider

[randmonkey]

Is there an existing issue for this?

• I have searched the existing issues

Does this enhancement require public documentation?

• I have added an Acceptance Criteria item for adding and/or adjusting public documentation (if applicable)

Problem Statement

Split from #6325.
When we move uploading config to Konnect to a separate loop, we do not need to keep them in client provider and remove the related processing code in KongClient for sending config to Konnect. Removing them in code would reduce the complexity and make code cleaner.

Proposed Solution

• After we successfully moved config uploading to Konnect to a separate loop, remove KonnectClient in client provider
• Remove the code in KongClient to do special processes on sending config to Konnect

Additional information

Not a strong requirement for releasing the separate loop feature, but would make code and tests cleaner. So I did not add the release/required label.

Acceptance Criteria

• KonnectClient is removed in clients provider
• Process specific to sending configuration to Konnect is removed in KongClinent