devel/gammaray: Update to 3.4.0
Simplify LICENSE block. The project itself is licensed GPLv2+ only.
Limit to archs that the project supports.
Add missing dependencies, pet portclippy, use pipes as delimiters in
replacements for readability.
https://github.com/KDAB/GammaRay/releases/tag/v3.4.0
MFH: 2026Q2
(cherry picked from commit 790891821b9fae66ed465ab1db7b06809498292b)