Changes

Use 2023q1 osmo-ttcn3-hacks branch for 2023q1 SUTs

Fix the TTCN3-centos-pcu-test-2023q1 jenkins job where currently most
tests are failing. This is because 2023q1 is using an older PCUIF
version that is no longer supported by osmo-ttcn3-hacks.git. As
discussed, use a 2023q1 branch of osmo-ttcn3-hacks where the support was
not removed yet.

Fixes: SYS#6638
Change-Id: Id82425aca4a8ff87feb8a130d31712bc62fa27ed