Add setting to disable NPM Not installed error (#25112)

Adds a new setting to disable the npm not installed warning that we show when ATA fails

Fixes #25063

extensions/typescript/package.json

@@ -105,6 +105,11 @@
           "default": true,
           "description": "%typescript.check.tscVersion%"
         },
+        "typescript.check.npmIsInstalled": {
+            "type": "boolean",
+            "default": true,
+            "description": "%typescript.check.npmIsInstalled%"
+          },
         "typescript.referencesCodeLens.enabled": {
           "type": "boolean",
           "default": false,