Update CODEOWNERS (bulk-codeowners)

[pcn]

Updating the CODOWNERS file to accomodate the reorg.

How this change was made

Changes are being made to replace no-longer-valid team names with the names of teams that are replacing them, and adding what will be the new names for teams that should exist post-reorg.

The code making these changes is in https://github.com/netlify/codeowners-scanner/

The announcement about this is in #crew-engineering

_{This PR was generated using turbolift.}