[Fix]: fix BSL

- keep ANGLE RGBA16 textures on the native norm16 path

- add separate RGB16 and SNORM16 fallback controls for DirectGLES format normalization

- convert RGB16 fallback uploads to float when using RGB32F storage

MobileGL/MG_Util/Texture/TextureFormatProcessor.h

@@ -12,10 +12,12 @@
 namespace MobileGL {
     enum class PixelFormatNormalizeOptionBit : Uint {
         NoNorm16 = 1 << 0,
+        NoSnorm16 = 1 << 1,
+        NoRgb16 = 1 << 2,
         None = 0,
     };
     namespace MG_Util::TextureFormatProcessor {
         void NormalizePixelFormat(GLenum internalFormat, Flags<PixelFormatNormalizeOptionBit> options,
                                   GLenum* outInternalFormat, GLenum* outFormat, GLenum* outType);
     } // namespace MG_Util::TextureFormatProcessor
-} // namespace MobileGL
+} // namespace MobileGL