GameSettings: Add per-game input bindings from profiles

This just affects the **bindings**. You will still have to set the
controller type per game if this is different from the global default.

src/duckstation-qt/gamepropertiesdialog.ui

@@ -447,6 +447,16 @@
           <item row="1" column="1">
            <widget class="QComboBox" name="userControllerType2"/>
           </item>
+          <item row="2" column="0">
+           <widget class="QLabel" name="label_19">
+            <property name="text">
+             <string>Input Profile For Bindings:</string>
+            </property>
+           </widget>
+          </item>
+          <item row="2" column="1">
+           <widget class="QComboBox" name="userInputProfile"/>
+          </item>
          </layout>
         </widget>
        </item>