feat: ZMS-6: Add redis cluster support

[NickOvt]

• This is a backwards compatible change. Current WD instances running using standalone redis will continue running as is.
• Currently not all potentially-same-slot (or same-node) keys are hashed to same slot, as some WD plugins may use the non hash-tag versions of the keys (zonemta-wildduck, haraka-plugin-wildduck).
• Lua scripts use the same key for all commands so separate hash tags for them are not required.
• Some multi() commands have been currently broken down into multiple redis commands (optimized as best as possible using Promise.all or Promise.allSettled).
• If using standalone redis then the original commands are preserved as is for multi() calls or where it made sense to leave them as-is.