Rename RenderSelectionInfo to RenderSelectionGeometry as part of rename work to clarify classes around highlights.
<rdar://problem/115575135>
Pull request: https://github.com/WebKit/WebKit/pull/17829
Committed 268051@main (5b2b95668aa2): <https://commits.webkit.org/268051@main> Reviewed commits have been landed. Closing PR #17829 and removing active labels.