Changes

jobs/gerrit: osmo-ttcn3-hacks: tweak make lines

* The "make clean" is not needed, as the osmo-ttcn3-hacks.git repository
  is a fresh clone of code that was submitted to gerrit.
* The "make deps" is not needed, as "make compile" depends on the deps
  target.
* Combine the cd and make lines.
* Remove ; at the end of lines, as it is not needed
* Switch " and ', so variables can be used with less escaping in future
  patches in this block.

Change-Id: Iac179bfb26478ecab51f47e469b4be7b0f9a5a94

jobs/gerrit: use deps cache from docker image

Instead of freshly cloning the dependencies each time, use the cache we
already have in the debian-bookworm-titan docker image. This way only
the dependency repositories that were changed in the patch submitted to
gerrit need to be updated.

Related: OS#6572
Change-Id: I895011edf49f612d0df7f4759dc374bab60c32a6

jobs/gerrit: osmo-ttcn3-hacks: drop chown

The chown takes some time, do it once when building the docker image
instead of doing it for every gerrit verification run.

Depends: docker-playground Id51885d0929f4966b1a4a181b3453c06d7956b53
Change-Id: I4bea336097e8180b19b3afa41c0b984d93c21bd1

gerrit-verifications,master-builds: Add pyosmocom

Change-Id: I9ec289f8d3116bbc8291298146c58d0209684439

scripts: adjust to pyosmocom move to gerrit

Related: OS#6573
Change-Id: I5ebbbd87c562e7bfa21792db0eadb556716ad252