lisa.wa: Avoid error logging for mixed WA workloads
lisa.wa: Avoid error logging for mixed WA workloads

Allow artifact collectors to declare which workload name they expect,
and swallow any exception if the expected name is set and does not match
the given JobOutput.

ARM-software/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,credp/lisa,credp/lisa,credp/lisa,ARM-software/lisa