Sebastian Wick a085281138 tests/dbus-runner: Clean up launching the tests
Move the wrapper functionality where it is actually used, use a single
mechanism to determine if we're already in a dbus-runner environment and
make the mocked launching simpler.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4022>
2025-01-15 22:56:29 +01:00
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