We now have live (to be executed), failed and to be reported queues.
Archive jobs have all three types, retrieve jobs do not have a to be reported
queue. The RootEntry interface interface now provides the choice between the types.
All uses are currently hardcoded to LiveJobs.

Also added missing implementation of RecallReportPacker::ReportError::execute.

Fixed discrepencies detected as a consequence (one of which made previous
commit fail unit tests.

The error(s) gets recorded at failure time, and the list is printed at
job deletion time.

The retrieve request being queued in one queue only, we can add a reference to
it in the queue, and then create the request object after. This is a simplification
from the previous algorithm.

Added logs for request creation. This will now create a log line where both the object
name and the file Id and path are available as parameters, easing debugging,.

Also corrected some logs.

Also fixed some logs.

OptionStrList takes a filename as its value. It reads the file into a
list of strings in the protobuf. On the server side, the values are
unpacked and made available as std::vector<std::string>.

For example implementation, see "cta-admin repack add"

The jobs will now remain attached to the agent of the drive process. The garbage collector
process will now requeue them instead of drive process. This will allow the drive process
to restart faster for a new session and the drive process to requeue the jobs faster a it
processes jobs in bulk.

We should not be overdoing it: it should be owned by user cta but we do not care about the group. This was failing in CI as cta group does not exist anymore

Also cut the main garbage collection function into smaller bits.
We requeue jobs in batches of 500.

Successful retrieve requests are asynchronously deleted as soon as they
are complete. Then from time to time (every 500), the requests get removed from
process ownership in bulk.

Retry once the archiveretrieve CI job, as sometimes the eos instance reports no space for a possible bad timing between the FST and the MGM.