RPM Spec
--------
Remove all Go dependecies
Add Start and End marker comments for bundling information
Add '-k' to goprep to preserve the vendor directory
tools
-----
Add script to update the RPM spec file to generate the indication lines
based on vendor/modules.txt
Packit
------
Run the new script as a post-upstream-clone hook
Makefile
--------
Run the new script on the generated spec file before generating the RPM
mockbuild.sh
------------
Run the new script before creating the RPM
Exclude s390x for now as it is emulated in COPR and `go` binary
segfaults when building osbuild-composer.
Signed-off-by: Tomas Hozza <thozza@redhat.com>