Revert lwgeom_clip_by_rect to use GEOSClipByRect

Revert lwgeom_clip_by_rect to use GEOSClipByRect

This commit reverts lwgeom_clip_by_rect to its implementation in PostGIS 2.2 -
2.4.

It makes trivial modifications to the MVT tests to reflect the different results
returned by GEOSClipByRect instead of GEOSIntersection. The changed results are
topologically equivalent to the previous results, and their orientation is
unchanged.

No tests have been commented out or made version-dependent.

Closes #4134
Closes #4135
References #4038
Closes https://github.com/postgis/postgis/pull/282

git-svn-id: http://svn.osgeo.org/postgis/trunk@16679 b70326c6-7e19-0410-871a-916f4a2858ee