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.}

[conventional-commit-lint-gcf]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

-- conventional-commit-lint bot
https://conventionalcommits.org/

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