fix `ones` and `wecom` integration api test on JH side

FAILED CI JOB: https://jihulab.com/gitlab-cn/gitlab/-/jobs/12614790

in spec/requests/api/integrations_spec.rb, it use Integration.available_integration_names(include_instance_specific: false) to loop all integration and trigger shared test group 'set up an integration' to verify integration rest api, however ones and wecom failed due to

ones

ones integration should be disabled if not paid license, we override method project#disabled_integrations method to hide ones , however Integration.integration_names still return ones , so the tricky things happen

1. test will try to run ones rest api
2. method user_project.find_or_initialize_integration(_slug_.underscore) runs in lib/api/integrations.rb during the test runs
3. in method user_project.find_or_initialize_integration(_slug_.underscore) , ones is disabled, so the test failed.

wecom

wecom rest api test failed due to 2 reason

1. wecom does not defined rest api endpoint, because method integrations and integration_classes in jh/lib/jh/api/helpers/integrations_helpers.rb didn't contains any wecom definition.
2. even we define the api endpoint, wecom integration creation will failed dut to 2 validations
   1. miss field `language_for_notify`: because factory_bot integration definition in jh/spec/factories/integrations.rb didn't contain the required field language_for_notify
   2. validate method check_channel_name_format failed during test run because this method will check property channel_names follow WECOM_ROBOT_WEBHOOK_KEY_REGEX. The tricky things is we can ONLY pass api params according to dsl method `field` in model wecom, which means we cannot modify factory bot definition to pass channel_names in test.

I think we need more discuss above two errors, not sure we still need pay effort to fix it or disable above two integration rest api endpoint.