Support highly available CAPI management components across clusters.

**User Story**

As an operator I would like to be able to configure redundant Cluster API components across clusters for automatic failover of workload cluster management.

**Detailed Description**

In a failure scenario where a management cluster is not functioning or inaccessible, remediation is mostly manual. In production deployments that rely on CAPI to back a mid-tier for cluster lifecycle operations this could mean unacceptable downtime. I believe an active-passive configuration with automatic failover is more feasible in the short-term. An active-active configuration could help support load balancing efforts for environments with a higher number of cluster CRUD requirements.

**Anything else you would like to add:**

If the user story is achievable now this may just need documentation. Otherwise I suspect this functionality would require a larger KEP but I'm familiar with that process.

[Miscellaneous information that will assist in solving the issue.]

/kind feature

Start with CONTRIBUTING.md and its CAEP process, then determine whether highly available CAPI management components across clusters are already supported. The issue provides no files or tests to inspect; completion would be either documentation of existing support or a larger proposal for active-passive or active-active failover.

Written by the indexing model from the issue text.