Refactor add_to_app_life_cycle_tests (flutter#145546)

Refactor add_to_app_life_cycle_tests in order to reduce testing logic in test.dart, create a suite_runners directory and allow for later implementing package:test onto add_to_app_life_cycle_tests

Part of flutter#145482

dev/bots/suite_runners/run_add_to_app_life_cycle_tests.dart

@@ -0,0 +1,23 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io' show Platform;
+
+import 'package:path/path.dart' as path;
+
+import '../run_command.dart';
+import '../utils.dart';
+
+Future<void> addToAppLifeCycleRunner(String flutterRoot) async {
+  if (Platform.isMacOS) {
+    printProgress('${green}Running add-to-app life cycle iOS integration tests$reset...');
+    final String addToAppDir = path.join(flutterRoot, 'dev', 'integration_tests', 'ios_add2app_life_cycle');
+    await runCommand('./build_and_test.sh',
+      <String>[],
+      workingDirectory: addToAppDir,
+    );
+  } else {
+    throw Exception('Only iOS has add-to-add lifecycle tests at this time.');
+  }
+}

dev/bots/test.dart

@@ -66,6 +66,7 @@ import 'package:process/process.dart';
 import 'browser.dart';
 import 'run_command.dart';
 import 'service_worker_test.dart';
+import 'suite_runners/run_add_to_app_life_cycle_tests.dart';
 import 'tool_subsharding.dart';
 import 'utils.dart';
 
@@ -230,7 +231,7 @@ Future<void> main(List<String> args) async {
       printProgress('Running task: ${Platform.environment[CIRRUS_TASK_NAME]}');
     }
     await selectShard(<String, ShardRunner>{
-      'add_to_app_life_cycle_tests': _runAddToAppLifeCycleTests,
+      'add_to_app_life_cycle_tests': () => addToAppLifeCycleRunner(flutterRoot),
       'build_tests': _runBuildTests,
       'framework_coverage': _runFrameworkCoverage,
       'framework_tests': _runFrameworkTests,
@@ -790,19 +791,6 @@ Future<void> _flutterBuildDart2js(String relativePathToApplication, String targe
   );
 }
 
-Future<void> _runAddToAppLifeCycleTests() async {
-  if (Platform.isMacOS) {
-    printProgress('${green}Running add-to-app life cycle iOS integration tests$reset...');
-    final String addToAppDir = path.join(flutterRoot, 'dev', 'integration_tests', 'ios_add2app_life_cycle');
-    await runCommand('./build_and_test.sh',
-      <String>[],
-      workingDirectory: addToAppDir,
-    );
-  } else {
-    printProgress('${yellow}Skipped on this platform (only iOS has add-to-add lifecycle tests at this time).$reset');
-  }
-}
-
 Future<void> _runFrameworkTests() async {
   final List<String> trackWidgetCreationAlternatives = <String>['--track-widget-creation', '--no-track-widget-creation'];