Use --deep option to look-up sites info for given dataset (rucio container)

[vkuznet]

According to discussion in this thread cms-sw/cmssw#40889 (comment) DAS provides different set of site results for two types of DAS queries:

• site file=file.root
• and, file dataset=/a/b/c site=XYZ

The cause of this lies in usage of --deep flag in URL call like this http://cms-rucio.cern.ch/replicas/cms/RelValTTbar_14TeV/CMSSW_12_3_0_pre5-123X_mcRun4_realistic_v4_2026D88noPU-v1/GEN-SIM (second use-case above). We need Rucio team assistance, e.g. from @ericvaandering , to provide clear REST API option for this --deep python flag. Once REST API call will be clarified then it can be incorporated into DAS codebase.

[ericvaandering]

Commented on the referenced issue

[vkuznet]

Added deep option in this commit 6e74f2e