This tests shows that there is a problematic buffer configuration.
The host locks up when `CONFIG_BT_BUF_ACL_RX_COUNT` is smaller or equal
to the number of connected peers, and all those peers send an L2CAP PDU
that needs re-assembly at the same time.
Although this seems far-fetched, this bug has been observed in a
real-life situation on actual hardware.
Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>
This code can be found (kinda) duplicated all over
`tests/bsim/bluetooth`.
Put it in a common place.
Refactoring the current tests will be done in a future commit.
Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>
