textproc/ripgrep: Update 15.1.0 => 15.2.0

This release fixes a number of bugs related to gitignore matching as well as
some performance improvements in directory tree traversal.

While here, strip installed binary to satisfy stage-qa.

Changelog:
https://github.com/BurntSushi/ripgrep/releases/tag/15.2.0

PR: 297272
Reported by: Petteri Valkonen <petteri.valkonen@iki.fi> (maintainer)
Approved by: osa, vvd (Mentors, implicit)
MFH: 2026Q3