Add support for Redis Cluster

[blakehatch]

Description

Add support for redis cluster by swapping out connection manager with connection cluster.

Type of change

Please delete options that aren't relevant.

• [x] New feature (non-breaking change which adds functionality)

Checklist

• [x] Updated documentation if needed
• [x] Tests added/amended
• [x] bazel test //... passes locally
• [x] PR is contained in a single commit, using git amend see some docs

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This change is