test/integration/goDebug: modify teardown+cleanup test

dlv dap started to handle disconnect requests while debugees are running.
Completely skip sending a disconnect request before disposing the debug
adapter during testing.

Updates #1481
Change-Id: I5f4dad864d3f28d726a64bab8dd45534c8e0d6d7
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/318789
Reviewed-by: Suzy Mueller <[email protected]>
Trust: Hyang-Ah Hana Kim <[email protected]>

Author: hyangah

test/integration/goDebug.test.ts

@@ -1606,9 +1606,8 @@ const testAll = (ctx: Mocha.Context, isDlvDap: boolean) => {
 				assert.fail(`debug output ${OUTPUT} wasn't built: ${e}`);
 			}
 
-			// It's possible dlv-dap doesn't respond. So, don't wait.
-			dc.disconnectRequest({ restart: false });
-			await sleep(10);
+			// Skip the proper disconnect sequence started with a disconnect request.
+
 			dlvDapAdapter.dispose(1);
 			dc = undefined;
 			await sleep(100); // allow dlv to respond and finish cleanup.