chore: ensures more stable CI runs on Windows environments. (#3070)

This pull request includes a small but important change to the
`withTmpDir` function in `src/test_utils.ts`. The change adds error
handling to ensure that a `PermissionDenied` error during directory
removal does not interrupt the execution.

Author: SisyphusZheng

src/test_utils.ts

@@ -125,7 +125,13 @@ export async function withTmpDir(
   return {
     dir,
     async [Symbol.asyncDispose]() {
-      await Deno.remove(dir, { recursive: true });
+      try {
+        await Deno.remove(dir, { recursive: true });
+      } catch (error) {
+        if (!(error instanceof Deno.errors.PermissionDenied)) {
+          throw error;
+        }
+      }
     },
   };
 }