BUG: sql_schema does not generate dialect-specific DDL

Release notes update
ENH: Timestamp: Support addl datetime classmethods

* `utcfromtimestamp`,`timestamp`, and `combine` now supported
* Closes #5351.
Merge pull request #8827 from artemyk/get_schema_fix_8697

BUG: sql_schema does not generate dialect-specific DDL
Merge pull request #8837 from jtratner/addl-timestamp-classmethods

ENH: Timestamp: Support addl datetime classmethods
DOC GH3508 (bis) added basic documentation of google analytics  in remote_data