Update codeowners post adapters-decoupling

[MichelleArk]

resolves #N/A

Problem

CODEOWNERS was referencing paths / teams that don't exist under dbt-labs!

Solution

Update CODEOWNERS to reflect codebase.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX
• This PR includes type annotations for new and modified functions

[MichelleArk]

this still exists but is just the starter_project for dbt init, shouldn't be an adapters concern any longer

https://github.com/dbt-labs/dbt-core/tree/main/core/dbt/include

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.00%. Comparing base (865b09b) to head (a68bffd).
Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9688      +/-   ##
==========================================
+ Coverage   87.98%   88.00%   +0.01%     
==========================================
  Files         178      178              
  Lines       22381    22451      +70     
==========================================
+ Hits        19693    19758      +65     
- Misses       2688     2693       +5     

Flag	Coverage Δ
integration	85.46% <ø> (+0.02%)	⬆️
unit	62.21% <ø> (+0.03%)	⬆️

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[colin-rogers-dbt]

one comment otherwise LGTM