GPU: Fix errors handling texture remapping (#4745)

* GPU: Fix errors handling texture remapping

- Fixes an error where a pool entry and memory mapping changing at the same time could cause a texture to rebind its data from the wrong GPU VA (data swaps)
- Fixes an error where the texture pool could act on a mapping change before the mapping has actually been changed ("Unmapped" event happens before change, we need to signal it changed _after_ it completes)

TODO: remove textures from partially mapped list... if they aren't.

* Add Remap actions for handling post-mapping behaviours

* Remove unused code.

* Address feedback

* Nit

src/Ryujinx.Memory/Range/MemoryRange.cs

@@ -57,5 +57,19 @@
 
             return thisAddress < otherEndAddress && otherAddress < thisEndAddress;
         }
+
+        /// <summary>
+        /// Returns a string summary of the memory range.
+        /// </summary>
+        /// <returns>A string summary of the memory range</returns>
+        public override string ToString()
+        {
+            if (Address == ulong.MaxValue)
+            {
+                return $"[Unmapped 0x{Size:X}]";
+            }
+
+            return $"[0x{Address:X}, 0x{EndAddress:X})";
+        }
     }
 }