gpui_wgpu: Reuse glyph image after measuring bounds (#63209)

Release Notes:

- Improved rasterization performance on Linux by caching glyphs after
measuring bounds.
1ff7cb669bJakub Konka committed on 8/25/2026, 5:56:09 PM· committed by GitHubparent3c2848e
1 file changedLine totals unavailable