chore(python): configure release-please on previous major versions

[gcf-owl-bot[bot]]

Source-Link: https://github.com/googleapis/synthtool/commit/c1dd87e9287f8de99930d3046dd555c4d03384c6 Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:2d13c2172a5d6129c861edaa48b60ead15aeaf58aa75e02d870c4cbdfa63aaba

[busunkim96]

RuntimeError: Unable to find library version in google/cloud/artifactregistry_v1/types/version.py with regex (?:__)?version(?:__)?\s*=\s*[\"'](?P<major_version>\d)\.[\d\.]+[\"']
    raise RuntimeError(
  File "/synthtool/synthtool/languages/python.py", line 178, in configure_previous_major_version_branches
    configure_previous_major_version_branches()
  File "/synthtool/synthtool/languages/python.py", line 261, in owlbot_main
    owlbot_main()
  File "/synthtool/synthtool/languages/python.py", line 265, in <module>
    exec(code, run_globals)
  File "/usr/local/lib/python3.9/runpy.py", line 87, in _run_code
    return _run_code(code, main_globals, None,
  File "/usr/local/lib/python3.9/runpy.py", line 197, in _run_module_as_main
Traceback (most recent call last):

[parthea]

There is a file called version.py file here which does not contain the version of this client. We could reintroduce owlbot.py since this is the only repo where we have an issue.

[parthea]

@busunkim96 WDYT?

[engelke]

I'm interested in how this gets resolved.

[parthea]

Superseded by #149