WebGLRenderer: Check for `EXT_color_buffer_float` for transmission. (#27761)

* fix: some feature need webgl extension

* chore: revert code

* chore: revert code

* chore: remove webgl1

* chore: remove webgl1

src/renderers/WebGLRenderer.js

@@ -1416,7 +1416,7 @@ class WebGLRenderer {
 
 				_transmissionRenderTarget = new WebGLRenderTarget( 1, 1, {
 					generateMipmaps: true,
-					type: extensions.has( 'EXT_color_buffer_half_float' ) ? HalfFloatType : UnsignedByteType,
+					type: ( extensions.has( 'EXT_color_buffer_half_float' ) || extensions.has( 'EXT_color_buffer_float' ) ) ? HalfFloatType : UnsignedByteType,
 					minFilter: LinearMipmapLinearFilter,
 					samples: 4
 				} );
@@ -2294,7 +2294,7 @@ class WebGLRenderer {
 
 					}
 
-					const halfFloatSupportedByExt = ( textureType === HalfFloatType ) && ( extensions.has( 'EXT_color_buffer_half_float' ) || ( extensions.has( 'EXT_color_buffer_float' ) ) );
+					const halfFloatSupportedByExt = ( textureType === HalfFloatType ) && ( extensions.has( 'EXT_color_buffer_half_float' ) || extensions.has( 'EXT_color_buffer_float' ) );
 
 					if ( textureType !== UnsignedByteType && utils.convert( textureType ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_TYPE ) && // Edge and Chrome Mac < 52 (#9513)
 						textureType !== FloatType && ! halfFloatSupportedByExt ) {