Add reactive variant of RedisClusterCommands [DATAREDIS-1150]

[spring-projects-issues]

Mark Paluch opened DATAREDIS-1150 and commented

We should expose a reactive variant of Redis Cluster commands (such as CLUSTER INFO) so that we can expose cluster metadata through a reactive API. Right now, Cluster commands are only available in an imperative variant at RedisClusterCommands

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Reference URL: spring-projects/spring-boot#21514

Issue Links:

• DATAREDIS-1155 LettuceConnectionFactory change breaks Redis actuator health check
  ("supersedes")

Referenced from: pull request #533

Backported to: 2.3.2 (Neumann SR2)