include the suite name when filtering test methods

In minitest v4.7.3 `MiniTest::Unit` tests the filters against the method names and the suite name followed by method name. This change makes it work the same way for `CI::Reporter::Runner`.

seattlerb/minitest@644a52fd0aa0205c8767829ca8afbd8c158f9ff2 is the last revision before v5.0.0
https://github.com/seattlerb/minitest/blob/644a52fd0aa0205c8767829ca8afbd8c158f9ff2/lib/minitest/unit.rb#L909-913