Suppress compiler warnings in release build.

[reshke]

fix #ISSUE_Number

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[my-ship-it]

Hey @reshke , the commit https://github.com/cloudberrydb/cloudberrydb/pull/673 already fixed the compile issue.

[reshke]

Hey @reshke , the commit #673 already fixed the compile issue.

ok, rebased on main, there is still some valuable diff

[my-ship-it]

Please fix CI failures.