The Cucumber Slack Notifier plugin's global configuration doesn't seem to work with Casc

• Jenkins version: - 2.204.2
• CasC version - 1.35
• cucumber-slack-notifier - 0.8.3

Refs:

• My original ticket: https://github.com/jenkinsci/configuration-as-code-plugin/issues/1271
• Page that brought me here: https://wiki.jenkins.io/display/JENKINS/Plugins+compatibility+with+Jenkins+Configuration-as-Code+plugin#PluginscompatibilitywithJenkinsConfiguration-as-Codeplugin-Knownissuesandresolutions