Unify most of the DebugGetShader* functions

GPU/GPUCommonHW.h

@@ -15,6 +15,10 @@ public:
 
 	u32 CheckGPUFeatures() const override;
 
+	// Using string because it's generic - makes no assumptions on the size of the shader IDs of this backend.
+	std::vector<std::string> DebugGetShaderIDs(DebugShaderType shader) override;
+	std::string DebugGetShaderString(std::string id, DebugShaderType shader, DebugShaderStringType stringType) override;
+
 protected:
 	void UpdateCmdInfo() override;