Summary:
If only some c++ tests are run then they trigger the missing Mac tests filter. Fix this by ignoring such tests from the filter.

Fixes #28923
Jira: DB-18649

Original commit: 5c5db2ca8fdba05b7d2c8614b4383a9183279317 / D47420

Test Plan: Jenkins

Reviewers: rthallam, steve.varnau

Reviewed By: steve.varnau

Subscribers: ybase

Differential Revision: https://phorge.dev.yugabyte.com/D47658