Allow no-homogeneous-tags to be turned off for feature files with only one scenario

[aaron-koch-sxm]

In order to integrate Gherkin with other tools, like CI/CD pipelines and documentation tools like JIRA/Testrail, my team wants to add an @uuid tag to each of our test cases. Some of our feature files currently have only a single test case (we have only recently begun to use gherkin). When we add the @uuid tag to the scenario, we violate the no-homogeneous-tags rule, but we don't want to move the @uuid tag to the feature level because the tag is supposed to uniquely identify scenarios, not features. In general we would prefer to keep the no-homogeneous-tags rule active, but we would like to disable it if there is only one scenario in a feature.