Fix and remove a few no-shuffle tags in flutter_tools. (#157656)

Two of the tests, `test_test` and `break_on_framework_exceptions`, no longer appear to leak (without changes). Perhaps underlying infrastructure has changed, or some other bug in the tool itself was fixed in meantime.

`packages_test` required resetting `Cache.flutterRoot`.

Work towards flutter/flutter#85160.

Author: matanlurey

packages/flutter_tools/test/commands.shard/permeable/packages_test.dart

@@ -2,13 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=1000"
-@Tags(<String>['no-shuffle'])
-library;
-
 import 'dart:async';
 import 'dart:convert';
 
@@ -38,9 +31,15 @@ void main() {
 
   setUp(() {
     mockStdio = FakeStdio()..stdout.terminalColumns = 80;
+
+    // Some tests below override this with a blank root, always reset it.
+    Cache.flutterRoot = null;
+  });
+
+  setUpAll(() {
+    Cache.disableLocking();
   });
 
-  Cache.disableLocking();
   group('packages get/upgrade', () {
     late Directory tempDir;
     late FakeAnalytics fakeAnalytics;

packages/flutter_tools/test/integration.shard/break_on_framework_exceptions_test.dart

@@ -2,13 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=1000"
-@Tags(<String>['no-shuffle'])
-library;
-
 import 'dart:async';
 
 import 'package:file/file.dart';

packages/flutter_tools/test/integration.shard/test_test.dart

@@ -2,13 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=1000"
-@Tags(<String>['no-shuffle'])
-library;
-
 import 'dart:async';
 import 'dart:convert';