Disable the IntelliJ inspection for string templates (#124570)

IntelliJ has been suggesting switching to string templates (at least
it has for me). This is unhelpful advice, since the feature was only
ever a tech preview and was removed in more recent JVMs. This change
disables that inspection.

.idea/inspectionProfiles/Project_Default.xml

@@ -9,6 +9,7 @@
     <inspection_tool class="PointlessBooleanExpression" enabled="false" level="WARNING" enabled_by_default="false">
       <option name="m_ignoreExpressionsContainingConstants" value="true" />
     </inspection_tool>
+    <inspection_tool class="StringTemplateMigration" enabled="false" level="WARNING" enabled_by_default="false" />
     <inspection_tool class="jol" enabled="false" level="WARNING" enabled_by_default="false" />
   </profile>
 </component>