ORC-1732: [C++] Fix detecting Homebrew-installed Protobuf on MacOS

[luffy-zh]

What changes were proposed in this pull request?

Detect Protobuf installed by Homebrew on macOS.

Why are the changes needed?

Deal with the issue discussed here

How was this patch tested?

Test it locally.

Was this patch authored or co-authored using generative AI tooling?

NO

[wgtmac]

@kou Could you help review this? Thanks!

[wgtmac]

The new github action doesn't run. I found the error message below:

Invalid workflow file: .github/workflows/build_and_test.yml#L224
The workflow is not valid. .github/workflows/build_and_test.yml (Line: 224, Col: 7): 'run' is already defined .github/workflows/build_and_test.yml (Line: 225, Col: 7): 'run' is already defined

https://github.com/apache/orc/actions/runs/9746489872

[dongjoon-hyun]

Thank you, @luffy-zh , @wgtmac , @kou . Merged to main/2.0.