SRPM from ART contains rebase.sh intermediate artifacts in _output and weights 190MB as rpm and 1.4GB after extracting

rc4 for sure - https://brewweb.engineering.redhat.com/brew/buildinfo?buildID=2299233

Get the srpm for ART build, extract the contents, and look for existence and contents of _output dir

1. Get srpm, e.g.
wget http://download.eng.bos.redhat.com/brewroot/vol/rhel-8/packages/microshift/4.12.0~rc.4/202212101015.p0.g43f0923.assembly.rc.4.el8/src/microshift-4.12.0~rc.4-202212101015.p0.g43f0923.assembly.rc.4.el8.src.rpm

2. `ls -lah` on file to get its size

3. extract rpm:
rpm2cpio ./microshift-4.12.0\~rc.4-202212101015.p0.g43f0923.assembly.rc.4.el8.src.rpm  | cpio -idmv

4. extract the tgz:
tar xf microshift-4.12.0\~rc.4-202212101015.p0.g43f0923.assembly.rc.4.tar.gz

5. ls microshift-4.12.0\~rc.4/_output/staging/;
du -sh microshift-4.12.0\~rc.4/_output/staging/

_output dir exists and weights 1.2GB

_output dir is not included in the SRPM