Update the AI Provider plugins to their latest versions

[dkotter]

What?

Ensure we reference the three core AI Provider plugins by the right slug and we update to the latest versions of those.

Why?

We include the three core AI Provider plugins (Anthropic, Google, OpenAI) in our composer config and use those in integration tests. Those were being referenced by old slug names and were using out-dated versions. This PR updates both.

How?

• Update the slug names in our composer config to reference the right repos
• Run a composer update on those three packages to pull in the latest versions

Use of AI Tools

No

Testing Instructions

Nothing much to test here. Can run integration tests locally if desired to ensure those still work

Changelog Entry

Developer - Update to the latest version of the three core AI Provider plugins used in our tests

[github-actions]

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Co-authored-by: dkotter <dkotter@git.wordpress.org>

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.49%. Comparing base (a31b0ec) to head (2247ff3).

Additional details and impacted files

@@            Coverage Diff            @@
##              trunk     #275   +/-   ##
=========================================
  Coverage     86.49%   86.49%           
  Complexity     1327     1327           
=========================================
  Files            68       68           
  Lines          4295     4295           
=========================================
  Hits           3715     3715           
  Misses          580      580           

Flag	Coverage Δ
unit	86.49% <ø> (ø)

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