[GPU] Texture integer scaling fetches; 8_8_8_8_GAMMA resolve

Integer num_format fetches now get their scale CPU-side instead of trying to guess in the shader. This is authoritative; no cvar. Both translators now use texture_integer_scale_bits after signs/gamma and before exponent bias. This alone fixes black screens and a bunch of rendering bugs across at least several dozen titles.

This new information lives in the updated FormatInfo table, including fixed component widths.

Resolve also has two new fixes.

8_8_8_8_GAMMA EDRAM sources can now decode through the PWL curve while still in linear space, before MSAA resolve or format conversion, then re-encoded for gamma destinations. This is also now default enabled via gamma_decode_pwl_resolve and has improved blowout in at least 4 titles, with no obvious regressions thus far.

Full resolve can also now pack fixed destinations according to copy_dest_number.

src/xenia/gpu/texture_info.h

@@ -195,6 +195,8 @@ struct FormatInfo {
   const uint32_t block_width;
   const uint32_t block_height;
   const uint32_t bits_per_pixel;
+  const uint8_t component_bits[4];
+  const bool fixed;
 
   uint32_t bytes_per_block() const {
     return block_width * block_height * bits_per_pixel / 8;