Patch to syncstores to enable support for PostGIS 3.4

[swainn]

Description

In PostGIS 3, the raster functionality is moved to a separate extension: postgis_raster. This PR updates syncstores to add the raster extension if it detects PostGIS version 3.

Changes Made to Code:

• Syncstores command checks PostGIS version and creates the postgis_raster extension if on version 3.X when initializing a postgis database.

Additional Notes:

• CHL has requested this be released as a patch of 4.2 so their new server can get the fix.

Related

• See: #1095

Quality Checks

• [x] New code is 100% tested
• [x] Code has been formated
• [x] Code has been linted
• [x] Docstrings for new methods have been added

[coveralls]

coverage: 100.0%. remained the same when pulling e6df0aff757f9095a8dcb4caecba2478bf6ca7a1 on syncstores-postgis3 into f618b8ceb2abb046fec66cac567e6622abff2b55 on main.