[Bug] Fix GUC ivfflat.max_probes

[roseduan]

pgvector and Cloudberry Database version

The GUC ivfflat.max_probes is used to control the number of results like limit, but in cbdb, data is distributed in different segments, the GUC should be adapted in MPP env.

What happened

GUC ivfflat.max_probes in cbdb env.

What you think should happen instead

No response

How to reproduce

make installcheck

Operating System

CentOS

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.