test(smoke): retry the temp-directory cleanup on ENOTEMPTY (#1838)

Language servers and debug adapters still write into the fixture's
temp dir as the test's afterEach tears it down, so a bare rmSync raced
them and failed the suite on ENOTEMPTY (Language smoke kotlin, java).
Give the removal maxRetries + retryDelay so a few late writes can't
flake the job.

smoke/debug.test.ts

@@ -109,7 +109,7 @@ afterEach(() => {
   resetRuns();
   disconnect?.();
   server?.close();
-  if (base) rmSync(base, { recursive: true, force: true });
+  if (base) rmSync(base, { recursive: true, force: true, maxRetries: 5, retryDelay: 200 });
 });
 
 async function open(c: Case): Promise<string> {

smoke/run.test.ts

@@ -133,7 +133,7 @@ afterEach(() => {
   resetRuns();
   disconnect?.();
   server?.close();
-  if (base) rmSync(base, { recursive: true, force: true });
+  if (base) rmSync(base, { recursive: true, force: true, maxRetries: 5, retryDelay: 200 });
 });
 
 async function open(c: Case): Promise<string> {