tests/bsim: Reorder tests to avoid failure in GATT/SR/GAS/BV-01-C

GATT/SR/GAS/BV-01-C has just broken due to what appears
like a minor timing change.
This indicates the test may be too time sensitive.
Just reordering the tests, it passes again.
So let's reorder the test list, and we get the minor
benefit of havign them move alphabetically ordered.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>