render: set merged GS user data from shader registers

Co-authored-by: shadowbeat070 <70843316+shadowbeat070@users.noreply.github.com>

src/graphics/shader/shaderCompiler.h

@@ -15,7 +15,7 @@ class UserConfig;
 
 struct ShaderParams {
 	std::span<const uint32_t> code;
-	std::span<const uint32_t> user_data;
+	std::vector<uint32_t>     user_data;
 	uint64_t                  hash = 0;
 	std::span<const uint32_t> back_code;