YQL-20928: Fix YqlSelect quoted atoms and unsupported message

This PR "unmutes" some TPC-DS queries. There was 2 defect kinds fixed:

1. Other than ordinary `GROUP BY` variants were actually unsupported,
   but not checked by an implementation.

2. Just `Q(TString)` was used to make quoted atoms, but it is not
   generally correct, because it does not wrap the arbitrary content
   and so `QUOTED_ID`s with spaces made a ill-formed YQLs.

The second defect fix gave us +5 successfully compilable queries.
commit_hash:10891b4cfc19872c8bb4b0765de2efae26797693

0 files changed, 0 insertions, 0 deletions