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Pants

<https://github.com/pantsbuild/pants/issues/19781|#19781 CI inconsistently rebuilds Rust engine in jobs that don't expect it>
Issue created by <https://github.com/huonw|huonw>
*Describe the bug*

Some CI jobs (linting and testing Python) that should be using the pre-built Rust engine are not, and are instead building it from scratch. This fails, because they do not have `protoc` installed.

<https://github.com/pantsbuild/pants/actions/runs/6102240853/job/16560991050|https://github.com/pantsbuild/pants/actions/runs/6102240853/job/16560991050>

```
...
[=== 00:27 Building native code... ===]
info: syncing channel updates for '1.72.0-x86_64-unknown-linux-gnu'
...
thread 'main' panicked at 'Could not find `protoc` installation and this build crate cannot proceed without
...
```

*Pants version*

`main`

*OS*  
N/A

*Additional info*  
<https://pantsbuild.slack.com/archives/C0D7TNJHL/p1694036554476979|https://pantsbuild.slack.com/archives/C0D7TNJHL/p1694036554476979>
<https://github.com/pantsbuild/pants|pantsbuild/pants>

<https://github.com/pantsbuild/pants/issues/19781|#19781 CI inconsistently rebuilds Rust engine in jobs that don't expect it>
Issue closed as completed by <https://github.com/huonw|huonw>
<https://github.com/pantsbuild/pants|pantsbuild/pants>