[Bug] --enable_pax fails to detect missing protobuf development libraries

[edespino]

Apache Cloudberry version

When building Apache Cloudberry with --enable_pax, the configure step does not check for required protobuf development environment, leading to an opaque build failure downstream.

Expected:
configure should fail early and clearly if protobuf headers are missing.

What happened

Build failure

What you think should happen instead

No response

How to reproduce

Execute configure with --enable-pax in an environment which does not have protobuf dev environment

Operating System

Linux

Anything else

No response

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct.

[tuhaihe]

Hey @yjhjstz, could you help create a PR for this? Thanks!