Stop VSCode from Formatting .gitmodules file on save (#35373)

* Stop VSCode from running Formatter on .gitmodules

* associating .gitmodules with ini instead of plaintext

.vscode/settings.json

@@ -50,6 +50,7 @@
         "editor.defaultFormatter": "esbenp.prettier-vscode"
     },
     "files.associations": {
+        ".gitmodules": "ini",
         "*.mm": "cpp",
         "iostream": "cpp",
         "array": "cpp",
@@ -138,6 +139,9 @@
         "list": "cpp",
         "unordered_set": "cpp"
     },
+    "[ini]": {
+        "editor.formatOnSave": false
+    },
     // Configure paths or glob patterns to exclude from file watching.
     "files.watcherExclude": {
         "**/.git/objects/**": true,