Changes

scripts: osmo_git_clone_url: prefer using gerrit

Use gerrit as clone URL for libgtpnl, libasn1c, libsmpp34 and libusrp,
as the gitea URL for these is just a (very delayed!) mirror.

Related: https://osmocom.org/projects/cellular-infrastructure/wiki/Git_infrastructure
Change-Id: I6c643d31e1451d97566691b83a4167d42f3f5e41

scripts: osmo_git_clone_url: add osmo-epdg

Fix for currently failing Osmocom-release-manuals job:

  :: (osmo-epdg) Getting git tags
  fatal: unable to access 'https://gerrit.osmocom.org/osmo-epdg/': The requested URL returned error: 403

Change-Id: I419b2d097a1a11975e3f90b3f129d02f63bfcf9d

jobs/update-osmo*: add lx2-raspbian11build-ansible

Related: OS#5873
Change-Id: I358d040c82915878762b7586e98c32e0d828d9dd

jobs/README: convert to markdown

Convert to markdown, so it gets rendered in gitea.

Change-Id: I0b687b651b44c798d5d224b0a3ea734b1bc41dff

jenkins-jobs-osmo: new file

Do not recommend to the user anymore to put the Osmocom jenkins server
in their global jenkins-job-builder config, as this may lead to jobs
from other repositories being deployed to the Osmocom jenkins by
accident.

Instead of that, let the user put the config in this path:
	~/.config/jenkins_jobs/jenkins_jobs_osmo-ci.ini

Add a wrapper script that users this path, and makes sure that no global
config is present.

Related: SYS#6957
Change-Id: I1d7c50b2fef56e343cfe377b51f5f4304219cd22