Compatibilty inconsistency between gsutil and gcs-oauth2-boto-plugin

https://github.com/GoogleCloudPlatform/gcs-oauth2-boto-plugin/issues/75

gsutil is supposed to be compatible with Python 3.13, but gcs-oauth2-boto-plugin doesn't work with 3.12 and 3.13.

Start by reading the linked gcs-oauth2-boto-plugin issue and checking how gsutil depends on that plugin for Python 3.12 and 3.13. Identify the reported incompatibility and confirm the relevant compatibility behavior; done means gsutil and the plugin work together on both Python versions.

Written by the indexing model from the issue text.