Plumb `lotman.trace` XRootD config into Pelican config

[jhiemstrawisc]

Not a huge rush with this -- currently there aren't many log lines that trigger on explicit log mask levels (and the only one that does triggers at the default/unset value).

This involves connecting the Pelican config

Logging:
  Cache:
    Lotman: [error|warning|info|debug|trace]

to the XRootD config:

lotman.trace [none|error|warning|info|debug|trace]

NOTE: Unlike some XRootD configs, these levels are additive (e.g. info also implies warning, error). We should be able to directly map the Pelican log levels into this xrootd config).

[github-actions]

This issue is stale because it has been open for 60 days with no activity.