HPCC-9671 Add Published Query Pages

Created a ESPQuery Singleton

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5010 from GordonSmith/HPCC-9671

HPCC-9671 Add Published Query Pages

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>