old_style_cache_plugins integration tests should not use redis

[nitzmahone]

Summary

The old_style_cache_plugins integration tests currently always build redis from source and test against a real plugin, which is very slow and flaky. We should be able to achieve equal or superior coverage and vastly increase the speed of the tests by writing a surrogate cache plugin that's backed by disk, Python data structures, or some other mechanism much lighter-weight than redis.

Issue Type

Bug Report

Component Name

old_style_cache_plugins integration tests

Ansible Version

$ ansible --version

2.16 devel

Configuration

# if using a version older than ansible-core 2.12 you should omit the '-t all'
$ ansible-config dump --only-changed -t all
NA

OS / Environment

NA

Steps to Reproduce

ansible-test integration old_style_cache_plugins --docker ubuntu2204 -vvv

Expected Results

Slow test run due to inline build of latest redis

Actual Results

Fast test run with minimal-to-no external deps

Code of Conduct

• I agree to follow the Ansible Code of Conduct

[ansibot]

Files identified in the description:

• test

If these files are incorrect, please update the component name section of the description or use the component bot command.

[bcoca]

main reason i wrote the 'pickle' caching pluing https://docs.ansible.com/ansible/latest/collections/community/general/pickle_cache.html

but in core you can just use the json one.

[bcoca]

accidental close, forgot to rewrite commit comment