Currently, selected_tests_gen fails when generating multiversion tasks. Thus, in https://jira.mongodb.org/browse/SERVER-48105, we are no longer generating multiversion tasks. However, we should be generating multiversion tasks longterm.

As a server engineer,
I would like selected_tests_gen to generate multiversion tasks for me,
so that I have confidence that all tasks related to my code change will run.

AC:

• The changed files in this patch build result in the "multiversion_sanity_check_gen" task being generated