fix: strip trailing semicolon in cosmosdb and unify implementation

[murfffi]

Fixes, in part, #511 .

cosmosdb, like several other databases, needs trailing semicolons to be
removed from the statement before it is passed to the driver.

This fix applies that to cosmosdb and makes the other databases with identical
processing use the same implementation - presto, trino, athena, SAP ASE.

Drivers that strip trailing semicolon as part of other processing are
not included in the refactoring to keep scope small.

Testing: with xo/dburl#44 applied , testing cosmosdb ...

Also tested with trino.

[kenshaw]

Please drop the gocosmos alias change, and rebase this as a single commit. I'll rebase this on master and back-port this to the release-19 branch and cut a release. I'll also update the dburl dependency on the release-19 branch at that time, so the gocosmos alias works properly. Thanks.

[murfffi]

Thanks for taking a look! Squashed the commits. I left the gocosmos alias in because the two argument form of \connect - with native DSN - needs that alias to work:

Without native DSN \connect, users need to url-encode the cosmos API key so dburl can parse the connection string properly. I could add the alias as a separate PR but that will require even more work merging to release-19.

[murfffi]

Tested trino also to confirm that the mild refactoring didn't break the other affected DBs.