GLES2: Define LIGHT Spatial shader builtin

Fixes #25421.

drivers/gles2/shader_compiler_gles2.cpp

@@ -869,6 +869,7 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	//for light
 	actions[VS::SHADER_SPATIAL].renames["VIEW"] = "view";
 	actions[VS::SHADER_SPATIAL].renames["LIGHT_COLOR"] = "light_color";
+	actions[VS::SHADER_SPATIAL].renames["LIGHT"] = "light";
 	actions[VS::SHADER_SPATIAL].renames["ATTENUATION"] = "attenuation";
 	actions[VS::SHADER_SPATIAL].renames["DIFFUSE_LIGHT"] = "diffuse_light";
 	actions[VS::SHADER_SPATIAL].renames["SPECULAR_LIGHT"] = "specular_light";