SAAS-882 Allow using non default auth in-memory cache implementation …

[gmagniez]

Allow using non default auth in-memory cache implementation for GooglePubSub client.

Will allow adding for exemple an APCu cache to share the access_tokens between FPM processes when using short-lived credentials.

Description (for Contributor and Core Developer)

Definition Of Done (for Core Developer only)

• [ ] Tests
• [ ] Migration & Installer
• [ ] PM Validation (Story)
• [ ] Changelog (maintenance bug fixes)
• [ ] Tech Doc

[nestorAkeneo]

:heart_eyes: Thanks for taking the time to contribute! You're awesome! :heart_eyes:

In order for your contribution to benefit all other contributors and users, we need your permission.

For that, it is enough that you read this document, and that you sign it, if it suits you.

Contributor Agreement