Provide release steps for Codeflare operator repository

[sutaakar]

Repository is missing a documentation providing instructions to release a new version.

There is a GitHub workflow for releasing image, but from the readme it is not clear if this is the only action to be done to release this repository or whether there are other actions needed or any external dependency.

[sutaakar]

There is a new GitHub workflow which should address replaces handling for new releases.

[sutaakar]

Part of the release is to publish built bundle into community operators catalog - #97