Changes

jobs/ttcn3: run io_uring testsuites on all nodes

After most recent patches from Pau were merged, the io_uring testsuites
run on all jenkins nodes with the ttcn3 label again!

host2-deb11build-ansible has an older host kernel and needs ulimit
memlock increased to 1 GB. I've tried out e.g. 500 MB and it isn't
enough.

Closes: OS#6405
Change-Id: I59b9a7c3928281a0557c17629029adcbc5ae7410