Fixed IL2121 warnings on Linux

src/coreclr/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.LibraryBuild.xml

@@ -19,7 +19,7 @@
       <argument>ILLink</argument>
       <argument>IL2026</argument>
       <property name="Scope">member</property>
-      <property name="Target">M:Internal.Runtime.InteropServices.InMemoryAssemblyLoader.LoadInMemoryAssembly(System.IntPtr,System.IntPtr)</property>
+      <property name="Target">M:Internal.Runtime.InteropServices.InMemoryAssemblyLoader.LoadInMemoryAssemblyInContextImplLocal(System.IntPtr,System.IntPtr)</property>
       <property name="Justification">This warning is left in the product so developers get an ILLink warning when trimming an app with Internal.Runtime.InteropServices.InMemoryAssemblyLoader.IsSupported=true.</property>
     </attribute>
   </assembly>

src/coreclr/System.Private.CoreLib/src/Internal/Runtime/InteropServices/InMemoryAssemblyLoader.cs

@@ -29,9 +29,13 @@ public static unsafe void LoadInMemoryAssembly(IntPtr moduleHandle, IntPtr assem
             if (!IsSupported)
                 throw new NotSupportedException(SR.NotSupported_CppCli);
 
+            LoadInMemoryAssemblyInContextImplLocal(moduleHandle, assemblyPath);
+
+            void LoadInMemoryAssemblyInContextImplLocal(IntPtr moduleHandle, IntPtr assemblyPath){
 #pragma warning disable IL2026 // suppressed in ILLink.Suppressions.LibraryBuild.xml
-            LoadInMemoryAssemblyInContextImpl(moduleHandle, assemblyPath);
+                LoadInMemoryAssemblyInContextImpl(moduleHandle, assemblyPath);
 #pragma warning restore IL2026
+            }
         }
 
         /// <summary>