Report proper status in case RPM build failure is a result of SRPM build failure

[nforro]

Related to https://github.com/packit/packit-service/issues/2195.

This fixes two cases:

• babysit task updates build statuses in the DB but also overwrites status checks with a wrong message and link
• CoprBuildEndEvent for SRPM is never received and SRPM build status in the DB stays in pending forever

RELEASE NOTES BEGIN

We have fixed an issue when copr_build job status checks were sometimes wrongly updated with a misleading message after a SRPM build failure.

RELEASE NOTES END

[softwarefactory-project-zuul[bot]]

Build succeeded. https://softwarefactory-project.io/zuul/t/packit-service/buildset/4dde5b5d5f9442a884da5b03097d3715

:heavy_check_mark: pre-commit SUCCESS in 2m 18s :heavy_check_mark: packit-service-tests SUCCESS in 2m 20s

[softwarefactory-project-zuul[bot]]

Build succeeded. https://softwarefactory-project.io/zuul/t/packit-service/buildset/44da3d0549774c64b93f9103ec245c23

:heavy_check_mark: pre-commit SUCCESS in 2m 18s :heavy_check_mark: packit-service-tests SUCCESS in 2m 22s

[softwarefactory-project-zuul[bot]]

Build succeeded (gate pipeline). https://softwarefactory-project.io/zuul/t/packit-service/buildset/974973fce25b486fb05d9e4e7b726a31

:heavy_check_mark: pre-commit SUCCESS in 2m 37s