[Build] Make `make gen` more robust

[machichima]

make gen will cause multiple changes even if there's no update in protobuf, for example:

• Cargo.lock and swagger.json updated: https://github.com/flyteorg/flyte/actions/runs/20666819119/job/59426821409
• Cargo.lock and uv.lock updated: https://github.com/flyteorg/flyte/actions/runs/20672586830/job/59427458321?pr=6833

We should improve the make gen command to only generate things when there's update in protobuf

Tasks:

• (done) Prevent Cargo.lock changes: [Fix] Ignore cargo lock #6844
• (assigned) Prevent uv.lock changes
• (done) Prevent swagger.json changes: Seems to be proto definition and generation mismatch: Add test for TaskService.ListVersions and test script #6833 (comment)
• Other improvements...

[SZL741023]

Hi @machichima,
I want to do the prevent uv.lock change task.
thx

[machichima]

Thank you @SZL741023 ! Feel free to ping me if you have any question or request my review