googletest --> catch2

[samfreund]

Description

What changed?

Switches c++ test framework from googletest --> catch2

Why?

WPILib is doing it, and as they lead we follow. (They also won't publish the artifacts anymore soooo)

Testing

• I have tested this change locally
• Test evidence (screenshots, videos, or test results):

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AI Disclosure

• This PR was authored entirely by me
• This PR includes AI-generated code (e.g., from GitHub Copilot, ChatGPT)
  • If yes, I have reviewed all AI-generated code for correctness
  • If yes, please describe which parts were AI-assisted:

Describe AI involvement here if applicable

AI did the mass edits for changing the framework.

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Merge Checklist

• PR title is a short, imperative summary of changes
• PR description documents the what and why

Additional Checks (if applicable)

• User-facing changes? User documentation is updated
• Breaking changes? Migration guide is included in description and migrations are marked with // MIGRATION: <dataYear> where <dataYear> is the last season the pre-migration data was used in
• Bug fix? Regression test is added
• New dependency? License compatibility is verified and steps have been taken to follow it
• Serde changes? All messages are regenerated with no unexpected hash changes
• Configuration changes? Changes are backwards compatible with previous season's last release
• Pipeline/data exchange changes? Frontend types are updated in ./photon-client/src/types

[samfreund]

The new version of native-utils would pull in some other stuff too, so we may as well just close this and fold into #2566