test: address flakiness in e2e tests (angular#64219)

It was noted that there are some flakes in CI.
Using seed '29976' it was narrowed down to the e2e tests for the vscode extension.

PR Close angular#64219

Author: alan-agius4

vscode-ng-language-service/integration/e2e/BUILD.bazel

@@ -27,12 +27,13 @@ js_test(
         ":e2e",
         "//vscode-ng-language-service:node_modules/jasmine",
         "//vscode-ng-language-service:node_modules/jasmine-reporters",
-        "//vscode-ng-language-service:node_modules/typescript",
         "//vscode-ng-language-service:node_modules/xvfb",
         "//vscode-ng-language-service:npm",
         "//vscode-ng-language-service/integration/project",
         "//vscode-ng-language-service/integration/project:node_modules/@angular/common",
         "//vscode-ng-language-service/integration/project:node_modules/@angular/core",
+        "//vscode-ng-language-service/server:node_modules/@angular/language-service",
+        "//vscode-ng-language-service/server:node_modules/typescript",
     ],
     entry_point = ":index.js",
     env = {

vscode-ng-language-service/integration/e2e/helper.ts

@@ -11,6 +11,11 @@ export const FOO_TEMPLATE_URI = vscode.Uri.file(FOO_TEMPLATE);
 
 export async function activate(uri: vscode.Uri): Promise<void> {
   await vscode.window.showTextDocument(uri);
+
+  // This is needed for stabilization and to reduce flakes.
+  // The timeout gives the language server time to warm up.
+  await setTimeout(3_000);
+
   await waitForDefinitionsToBeAvailable(20);
 }
 

vscode-ng-language-service/server/src/BUILD.bazel

@@ -5,12 +5,6 @@ ts_project(
     srcs = glob(["*.ts"]),
     declaration = True,
     source_map = True,
-    tags = [
-        # Because the testing intentionally reaches into the output directories and crosses the sandbox
-        # boundaries, we need to explicitly make sure that this target is built locally so the testing
-        # can find expected files.
-        "no-remote-exec",
-    ],
     tsconfig = "//vscode-ng-language-service/server:tsconfig",
     visibility = [
         "//vscode-ng-language-service/server:__subpackages__",