Fix the interpreter selected by 'new venv' prompt (microsoft/vscode-python#18417)

Author: Kartik Raj

extensions/positron-python/src/client/pythonEnvironments/legacyIOC.ts

@@ -292,6 +292,7 @@ class ComponentAdapter implements IComponentAdapter {
         const query: PythonLocatorQuery = {
             searchLocations: {
                 roots: [workspaceFolder.uri],
+                doNotIncludeNonRooted: true,
             },
         };
         if (options?.ignoreCache) {