Revert "Add vespa program to vespa-clients RPM"

[aressem]

Reverts #20069

RPM building failed:

07:56:07 Processing files: vespa-7.504.2-1.el8.x86_64
07:56:07 error: Missing build-id in /vespa/vespa-rpmbuild/BUILDROOT/vespa-7.504.2-1.el8.x86_64/opt/vespa/bin/vespa
07:56:07 error: Generating build-id links failed
07:56:07 
07:56:07 
07:56:07 RPM build errors:
07:56:07     Missing build-id in /vespa/vespa-rpmbuild/BUILDROOT/vespa-7.504.2-1.el8.x86_64/opt/vespa/bin/vespa
07:56:07     Generating build-id links failed

[hakonhall]

Apparently this comes from RPM verifying the binaries contains a GNU build-id, which a go binary do not have by default (they make their own build-id). rpm-software-management/rpm#367 contains a discussion of this issue.

The alternatives I see are:
A. Specify -ldflags=-linkmode=external with the go build command.
B. Disable build-id checking for vespa-clients RPM with %global _missing_build_ids_terminate_build 0

[aressem]

I think B is ok.

[hakonhall]

Alright, implemented in #20077 .