Support rubocop 1.23.0 with an associated channel

[BrianHawley]

Same issue as #303, but for rubocop 1.23.0.

Create channel/rubocop-1-23-0 based on channel/rubocop-1-22-3.

I can make the PR to update channel/rubocop-1-23-0 with the right gem versions and any other appropriate changes.

[BrianHawley]

@fede-moya are you up for this one?

[BrianHawley]

@filipesperandio @fede-moya what is the status of this?

[f-moya]

@BrianHawley Hi 👋🏼 , sorry we have been busy. Branch rubocop-1-23-0 is here now 👍🏼

[BrianHawley]

Verified that the beta channel works in the codeclimate service.

Waiting for qltysh/qlty#1037 to check the CLI.

[BrianHawley]

New codeclimate version, so I could check the CLI. The beta channel works.