Implement an IndexManagementService to centralize CRUD operations on indexes

[fmassot]

Notes

• Add the IndexManagementService in quickwit-index-management new project.
• Implement the gRPC client so that other nodes can make gRPC calls for CRUD index operations.
• Move the garbage collect to the IndexManagementService
• Add garbage collection of local splits (IndexingSplitStore).
• Start the service on the ControlPlane node.
• (optional) Add REST API available on the Control Plane only.
• Update the CLI to use the gRPC client or REST API.

Related issues

• When starting a node, make sure there is a control plane node available
• If the control plane node shuts down, indexing pipelines should not restart indefinitely
• Make sure there is only one Control Plane in the cluster.