fix import error version.py for fedora 39 [SRE-7997]

[rushidave]

Package build failure on fedora 39, seen below:

[2024-01-21T10:54:07.962Z] + python3 setup.py install --root=/srv/jenkins/workspace/aiven-deps-mb-f38-x86_64_main/rpmbuild/BUILDROOT/pglookout-2.0.2-11.fc39.x86_64
[2024-01-21T10:54:07.962Z] Traceback (most recent call last):
[2024-01-21T10:54:07.962Z]   File "/srv/jenkins/workspace/aiven-deps-mb-f38-x86_64_main/rpmbuild/BUILD/pglookout-028ba9e6002c8a50c6c7f8147ab02620e12f12f7/setup.py", line 4, in <module>
[2024-01-21T10:54:07.962Z]     import version
[2024-01-21T10:54:07.962Z]   File "/srv/jenkins/workspace/aiven-deps-mb-f38-x86_64_main/rpmbuild/BUILD/pglookout-028ba9e6002c8a50c6c7f8147ab02620e12f12f7/version.py", line 9, in <module>
[2024-01-21T10:54:07.962Z]     import imp
[2024-01-21T10:54:07.962Z] ModuleNotFoundError: No module named 'imp'

[kmichel-aiven]

@alexole Looks good to me (and I double-checked by running it locally) but I don't have merge power on that repo.

[alexole]

@kmichel-aiven apparently I don't have too, will need to fix that and will merge.