[Ai slop]Deprecate and remove PytestPluginManager.getpluginIssue 5842 getplugin

[gabrielesequeira]

Summary

This PR deprecates and removes PytestPluginManager.getplugin() in two steps:

• Deprecation: Mark getplugin() as deprecated and migrate internal pytest usages to get_plugin().
• Removal: Remove the deprecated method and its associated deprecation test.

This change completes the transition to get_plugin() as the supported API for retrieving registered plugins.

Testing

• Configuration tests passed after both the deprecation and removal changes.
• Related test suites were executed to check for regressions.
• Some xdist integration tests failed because the installed pytest-xdist version still calls the removed getplugin() method.

[gabrielesequeira]

Hi! While testing this change, I found that removing PytestPluginManager.getplugin() causes an internal error with Hypothesis 6.170.0, because its pytest plugin still calls getplugin("terminalreporter").

The relevant tests pass when the Hypothesis pytest plugin is disabled, but fail when it is enabled.

How would you recommend proceeding? Should this removal be coordinated with a fix in Hypothesis, or would it be better to postpone the removal until dependent plugins have migrated to get_plugin()?

Thanks for your guidance!

[RonnyPfannschmidt]

Its absolutely ludicrous to do deprecation then removal into a single pr

Deprecation and removal are months to years appart