CODEOWNERS: specify messaging related folders (#10137)
CODEOWNERS: specify messaging related folders (#10137)

also removes since deleted helm permissions

Signed-off-by: Derek Perkins <e1c79a582b6629e6b39e9679f4bb964d25db4aa8@derekperkins.com>
mahak/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess