Add intrinsic test for new Type.GetMethod overload (#118003)

Add test for a new Type.GetMethod overload with genericParameterCount,
BindingFlags, and Type[] which was already covered by the existing
intrinsics logic.

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: sbomer <[email protected]>
Co-authored-by: Sven Boemer <[email protected]>
Co-authored-by: Jackson Schuster <[email protected]>

Author: 3 people

src/tools/illink/src/ILLink.Shared/TrimAnalysis/HandleCallAction.cs

@@ -582,6 +582,7 @@ ValueWithDynamicallyAccessedMembers valueWithDynamicallyAccessedMembers
                 // GetMethod(string, BindingFlags, Binder, CallingConventions, Type[], ParameterModifier[])
                 // GetMethod(string, int, Type[])
                 // GetMethod(string, int, Type[], ParameterModifier[]?)
+                // GetMethod(string, int, BindingFlags, Type[])
                 // GetMethod(string, int, BindingFlags, Binder?, Type[], ParameterModifier[]?)
                 // GetMethod(string, int, BindingFlags, Binder?, CallingConventions, Type[], ParameterModifier[]?)
                 //

src/tools/illink/test/Mono.Linker.Tests.Cases/Reflection/MethodUsedViaReflection.cs

@@ -30,6 +30,7 @@ public static void Main()
             GetMethod_Name_BindingAttr_Types.TestNameBindingFlagsAndTypes();
             GetMethod_Name_GenericParameterCount_Types.TestNameWithIntAndType();
             GetMethod_Name_GenericParameterCount_Types_Modifiers.TestNameWithIntAndTypeAndModifiers();
+            GetMethod_Name_GenericParameterCount_BindingAttr_Types.TestNameWithIntAndBindingFlagsAndTypes();
             GetMethod_Name_GenericParameterCount_BindingAttr_Binder_Types_Modifiers.TestNameWithIntAndBindingFlags();
             GetMethod_Name_GenericParameterCount_BindingAttr_Binder_Types_Modifiers_PrivateBinding.TestNameWithIntAndPrivateBindingFlags();
             GetMethod_Name_GenericParameterCount_BindingAttr_Binder_CallConvention_Types_Modifiers.TestNameWithIntBindingFlagsCallingConventionParameter();
@@ -486,6 +487,42 @@ public static void TestNameWithIntAndTypeAndModifiers()
             }
         }
 
+        // GetMethod(string name, int genericParameterCount, BindingFlags bindingAttr, Type[] types)
+        [Kept]
+        class GetMethod_Name_GenericParameterCount_BindingAttr_Types
+        {
+            private static int OnlyCalledViaReflection()
+            {
+                return 42;
+            }
+            private int OnlyCalledViaReflection(int foo)
+            {
+                return 43;
+            }
+            [Kept]
+            public int OnlyCalledViaReflection(int foo, int bar)
+            {
+                return 44;
+            }
+            [Kept]
+            public static int OnlyCalledViaReflection(int foo, int bar, int baz)
+            {
+                return 45;
+            }
+            [Kept]
+            public static int OnlyCalledViaReflection(string foo, string bar)
+            {
+                return 46;
+            }
+
+            [Kept]
+            public static void TestNameWithIntAndBindingFlagsAndTypes()
+            {
+                var method = typeof(GetMethod_Name_GenericParameterCount_BindingAttr_Types).GetMethod("OnlyCalledViaReflection", 1, BindingFlags.Public, new Type[] { typeof(int) });
+                method.Invoke(null, new object[] { });
+            }
+        }
+
         // GetMethod(string name, int genericParameterCount, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers)
         [Kept]
         class GetMethod_Name_GenericParameterCount_BindingAttr_Binder_Types_Modifiers