Make sure to import os in example and test gaudi opt files

[tmadlener]

BEGINRELEASENOTES

• Make sure to have an import os in all gaudi options files that use os in some form. This becomes necessary after k4run: allow addition of additional parameters from steering files k4FWCore#134

ENDRELEASENOTES

[andresailer]

There is still a test error about missing os

11/11 Test #11: clicRec_lcio_mt ..................***Failed    0.64 sec
Traceback (most recent call last):
  File "/cvmfs/sw-nightlies.hsf.org/key4hep/releases/2023-09-12/x86_64-centos7-gcc12.2.0-opt/k4fwcore/d2ee44d38122a401c6ffa3ee6de5f67ddc8c1275=develop-3h7hvo/bin/k4run", line 129, in <module>
    load_file(file)
  File "/cvmfs/sw-nightlies.hsf.org/key4hep/releases/2023-09-12/x86_64-centos7-gcc12.2.0-opt/k4fwcore/d2ee44d38122a401c6ffa3ee6de5f67ddc8c1275=develop-3h7hvo/bin/k4run", line 26, in load_file
    exec(file.read(), {})
  File "<string>", line 176, in <module>
NameError: name 'os' is not defined

[tmadlener]

I think now I got all of them 🤞

[andresailer]

Thanks!