Update freetype-sys to 0.23

- Split wrench into a different workspace, so we can avoid dependency unification.
  This is necessary since cargo doesn't allow two crate (versions) which link `freetype`.
- Because wrench depends on webrender and thus glyph_rasterizer, we need to disable the
  default feature static_freetype, so that wrench can still be built (with dynamic freetype).

This approachs avoids touching the unmaintained crate font-loader and the archived servo-fontconfig-sys

Author: jschwe