car: reset calibration when car changes

[danielpolimac]

Summary

Reset the saved camera calibration when the newly fingerprinted car differs from the previous route.

Calibration is specific to the device mounting geometry. Reusing it after moving a device to a different car can start the next drive with invalid extrinsics. The comparison runs before CarParams is published, so calibrationd observes the reset before loading its cached state.

Closes #38351

Validation

• Added regression coverage for preserving calibration on the same fingerprint.
• Added regression coverage for resetting calibration on a different fingerprint.
• 2 tests passed.
• Ruff and git diff checks passed.

[github-actions]

Process replay diff report

Replays driving segments through this PR and compares the behavior to master.
Please review any changes carefully to ensure they are expected.

✅ 0 changed, 66 passed, 0 errors

[danielpolimac]

The failing unit tests and Create UI Report jobs are blocked by the missing Raylib headless runtime dependency (libGLESv2.so.2), before this change runs. #38619 contains the isolated CI fix and is fully green. All remaining checks on this PR pass.