[GPU] Improve swiglu fusion pass (#24537)

### Details:
 - Allow reversed inputs order to last multiply op for swiglu pattern

src/plugins/intel_gpu/src/plugin/transformations/swiglu_fusion.cpp

@@ -51,7 +51,9 @@ SwiGLUFusion::SwiGLUFusion() {
         auto mul = std::dynamic_pointer_cast<ov::op::v1::Multiply>(pattern_map.at(mul_m).get_node_shared_ptr());
         if (!mul || transformation_callback(mul))
             return false;
-        if (mul->input_value(1).get_index() != 1)
+
+        size_t split_in_idx = ov::is_type<ov::op::v4::Swish>(mul->get_input_node_shared_ptr(0)) ? 1 : 0;
+        if (mul->input_value(split_in_idx).get_index() != 1)
             return false;
 
         auto variadic_split = std::dynamic_pointer_cast<ov::op::v1::VariadicSplit>(pattern_map.at(variadic_split_m).get_node_shared_ptr());

src/plugins/intel_gpu/tests/unit/transformations/swiglu_fusion_test.cpp

@@ -82,6 +82,28 @@ TEST_F(TransformationTestsF, SwiGLUFusionTest3) {
     }
 }
 
+TEST_F(TransformationTestsF, SwiGLUFusionTest3ReverseOrder) {
+    {
+        auto input = std::make_shared<ov::op::v0::Parameter>(ov::element::f16, ov::PartialShape{ -1, -1, 6 });
+        auto axis_const = ov::op::v0::Constant::create(ov::element::i64, ov::Shape{}, {-1});
+        auto split_lengths_const = ov::op::v0::Constant::create(ov::element::i64, ov::Shape{2}, {3, -1});
+        auto variadic_split = std::make_shared<ov::op::v1::VariadicSplit>(input, axis_const, split_lengths_const);
+        auto swish = std::make_shared<ov::op::v4::Swish>(variadic_split->output(0));
+        auto mul = std::make_shared<ov::op::v1::Multiply>(variadic_split->output(1), swish);
+
+        model = std::make_shared<ov::Model>(ov::NodeVector{mul}, ov::ParameterVector{input});
+        manager.register_pass<SwiGLUFusion>();
+    }
+    {
+        int64_t axis = -1;
+        int64_t split_lenghts = 3;
+        auto input = std::make_shared<ov::op::v0::Parameter>(ov::element::f16, ov::PartialShape{ -1, -1, 6 });
+        auto swiglu = std::make_shared<op::SwiGLU>(input, axis, split_lenghts, ov::element::f16);
+
+        model_ref = std::make_shared<ov::Model>(ov::NodeVector{swiglu}, ov::ParameterVector{input});
+    }
+}
+
 TEST_F(TransformationTestsF, SwiGLUFusionTest4) {
     {
         auto input = std::make_shared<ov::op::v0::Parameter>(ov::element::f16, ov::PartialShape{ -1, -1, 6 });