jobs/update-osmo-ci-on-slaves: don't run on ogt

Don't run this job on the osmo-gsm-tester machines. Right now this job
takes quite some time to build various docker images which we don't even
need on osmo-gsm-tester. It also uploads osmo-ci.git and
osmo-gsm-manuals.git, which don't need to be updated on these if we
don't run the osmo-gsm-tester jenkins jobs on them (see previous
commit). According to Pau they would be needed for
osmo-gsm-tester_ttcn3.

Related: OS#5811
Change-Id: I39d72740d896981f069ad339013c1e1e3d4f3bba

jobs/update-osmo-ci-on-slaves.yml

@@ -11,8 +11,6 @@
             - build3-deb11build-ansible
             - gtp0-deb10fr
             - host2-deb11build-ansible
-            - osmo-gsm-tester-prod
-            - osmo-gsm-tester-rnd
             - rpi4-raspbian11build-ansible-1
             - rpi4-raspbian11build-ansible-2
             - rpi4-raspbian11build-ansible-3