Fix some CODEOWNERS rules that missed some approvers

What does this MR do and why?

Fix some CODEOWNERS rules that missed some approvers

With !118461 (merged) we consolidated the CODEOWNERS file but misunderstood how default section code owners work.

If a line-specific code owner is specified, the default section code owner isn't used at all. If we want to add the line-specific code owners to the default section one, we need to repeat it with the line-specific code owners.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.