sql: support left (<<) and right (>>) bounding box operators

[timgraham]

They should adopt PostGIS behavior:
https://postgis.net/docs/ST_Geometry_Left.html
https://postgis.net/docs/ST_Geometry_Right.html

Currently it fails like this: unsupported binary operator: <geometry> >> <geometry> (desired <bool>).

Jira issue: CRDB-2868

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[timgraham]

Still a valid issue.