test: update default timeout inteval to 30 seconds (#1463)

This change is an effort to reduce the flakiness of the e2e tests on macos.
If those e2e tests are still still flaky after this change, we should consider them for macos.

(cherry picked from commit a546f55)

Author: atscott

integration/e2e/helper.ts

@@ -12,6 +12,8 @@ function sleep(ms: number) {
 }
 
 export async function activate(uri: vscode.Uri) {
+  // set default timeout to 30 seconds
+  jasmine.DEFAULT_TIMEOUT_INTERVAL = 30_000;
   await vscode.window.showTextDocument(uri);
   await waitForDefinitionsToBeAvailable(20);
 }