[FIX] web: tests: patch form multiClickTime once for all

A lot of tests in different QUnit modules need this delay to be
patched to 0. Some of them (e.g. the 'ActionManager > Misc' module)
didn't patch it correctly. It worked before because a patch was
done in a previous test, and wasn't unpatch. The previous commit
ensures the patch is removed, so now we have at least 2 tests of
the above mentionned module that fail. This commit ensures that
the delay is patched in every tests, and allows to specify a
custom delay if necessary.

addons/web/static/tests/fields/basic_fields_tests.js

@@ -151,13 +151,6 @@ QUnit.module('basic_fields', {
                 }]
             },
         };
-
-        testUtils.mock.patch(FormController, {
-            'multiClickTime': 0,
-        });
-    },
-    afterEach() {
-        testUtils.mock.unpatch(FormController);
     },
 }, function () {