Refactor the zone-based stoppable check logic and add support to randomly select zone order for the zone-based stoppable check.

Implement the cross-zone-based stoppable check and add to_be_stopped_instances query parameter to the stoppable check API

Add ability for up to 2 nodes with the same logicalId to be added to the cluster at the same time when a SWAP is happening.
During all paritionAssignment for WAGED and DelayedAutoRebalancer, we select just one instance for each logicalId. Achieves n -> n+1 for all replicas on SWAP_OUT node and back n when SWAP is marked complete, making it cancelable.

Adding and updating Helix Admin APIs to support swap operation:

setInstanceOperation
addInstance
canCompleteSwap
completeSwapIfPossible
* Refactor sanity checks for HelixAdmin swap APIs.

* Helix Node Swap pipeline changes and integration tests.

* Fix integration tests to properly restore stopped MockParticipant so following tests are not affected.

* Add comments and docstrings.

* Fix tests to clean up after themselves.

* Optimize duplicate logicalId filtering to only be called on allNodes and then used to remove duplicate logicalIds from enabledLiveNodes.

* Add handling for clusterConfig == null in updateSwappingInstances and fix AssignableNode to check for clusterTopologyConfig when attempting to get logicalId.

* Fix integ tests.

* Fix testGetDomainInformation since we no longer allow an instance to join the cluster with an invalid DOMAIN field.

* Add checks to ensure that the SWAP_IN instance has a matching FAULT_ZONE and matching INSTANCE_CAPACITY_MAP to SWAP_OUT node.

* Rename canSwapBeCompleted to canCompleteSwap.

* Add sanity checks to allow SWAP_IN node to join the cluster in disabled state before SWAP_OUT node has instance operation set.

* Fix print in test case.

* Add canCompleteSwap to PerInstanceAccessor and fix formatting.

* Fix flaky node swap after completion by making sure replica has is computed with logicalIds intead of instanceNames.

…ed blacklisting capabilities (#2687)

Enhanced stoppable checks with node evacuation filtering and introduced blacklisting capabilities

… kv pair for result of check or attempt to complete swap. (#2697)

…e picking assignable instances in the cache. (#2702)

Fix WAGED to only use logicalId when computing baseline and centralize picking assignable instances in the cache.

… and more predictable during an in-flight node swap. (#2706)

…#2710)

Prevent the spectator routing table from containing SWAP_IN instances.

* Change all rebalancer strategies to create Topology without additional non-FaultZone or EndNode levels of the tree. This will allow for swap to work in clusters where the non-FaultZone or EndNode domain kv pairs don't directly match the swapping node.

* Stabilize TestInstanceOperation. clusterVerifier is evaluating to true once the partitionAssignment matches the expected value; however, it is before the TopState is transfered back to the SWAP_IN node. This can be fixed by using TestHelper.verify to check that states converge within TIMEOUT.

* Moved evacuate tests with long ST resources to the end because it was taking long time to drop DBs which was causing flakyness in later tests. Ran TestInstanceOperation 5 times locally with success.