Both cases use a large static buffer, we can optimize here and use a
single mutex-protected buffer for both.
sendmsg() test case needed adjustments, as it was also testing a buffer
overflow scenario. This can only be properly tested however if CID
feature is disabled, as otherwise the common helper buffer size is
increased for the CID use case, preventing the overflow from taking
place.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
ba04734220