report merge stage infrastructure issues
Together with some reporter fix, this handles issue [0] seen in sentry. The problem is that the pipeline reports merge failure even though no merging was done. This patch instead makes the pipeline set 'skip' for the stage state in rc file.
This will allow SKIPPED prefix when the kernel was not tested because of an internal infrastructure issue that prevented merge stage from running.
[0] https://sentry.engineering.redhat.com/baseos/reporter-ng/issues/17908/?referrer=webhooks_plugin Signed-off-by: Jakub Racek jracek@redhat.com