Extend ARK/ELN CI pipelines

ARK:

• add debug pipeline for aarch64/x86_64
• add baseline pipelines

ELN:

• require successful pipelines if started automatically
• run RH selftests
• build SRPM for bot changes
• add baseline pipelines

Part of #113 (closed)

Signed-off-by: Michael Hofmann mhofmann@redhat.com