Changes

jobs/master,gerrit: use io_uring seccomp profile

Use the seccomp profile not only in ttcn3 testsuites, but also in
master-builds and gerrit-verifications so we can test io_uring there
too.

CI happened to work without this for libosmocore on build4 because of a
specific docker version where io_uring was not yet (fully?) disabled in
the default seccomp profile. It did not work without this patch on
build5 where we currently have a newer docker version.

Related: OS#6405, OS#6186
Related: docker-playground I27567c2a5d9543c3509c316226c082ab950c5ebc
Change-Id: I71df7f7eeb79b831fb67d2cda377cf1d0619b93d