[TT-9590] Bump the redis import to v9, add internal/redis to manage the imports

[titpetric]

This PR bumps the redis/v8 dependency and related packages to v9.

It creates internal/redis package to manage the import and list the symbols used in that package.

https://tyktech.atlassian.net/browse/TT-9590

[sweep-ai[bot]]

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• [ ] Apply: All new business logic should have corresponding unit tests.
• [ ] Apply: Refactor large functions to be more modular.
• [ ] Apply: Add docstrings to all functions and file headers.

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[titpetric]

Closing as storage update is in progress #355