Append CIVICRM_DEBUG_LOG_QUERY to sql log var

[eileenmcnaughton]

Same as civicrm/civicrm-core#18471 but for the other affected place

@totten

[civibot]

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[totten]

Looks sensible.

Re-tested with similar procedure as before, but with tighter monitoring of the outputted files, e.g.

rm ~/bknix/build/dmaster/web/sites/default/files/civicrm/ConfigAndLog/*log

env CIVICRM_DEBUG_LOG_QUERY=_test_2 cv flush

ls ~/bknix/build/dmaster/web/sites/default/files/civicrm/ConfigAndLog/

Confirmed that (1) the QUERY DONE statements now appear the alternate query log (_test_2) and (2) no other data is written to the default query log.