Support Stoppable Check for Non-Topology-Aware Clusters

[MarkGaox]

Issues

• My PR addresses the following Helix issues and references them in the PR description:
  Request - Make batch instances stoppable request work for clusters without topology setup #2893

Description

• Here are some details about my PR, including screenshots of any UI changes:

• Add a new selection base: NON_TOPO_BASED. In this scenario, the order of the zone will not be respected and all instances will be performed stoppable check at once. Additionally, this change supports the stoppable check for non-topo aware clusters.

Tests

• The following tests are written for this issue:
  mvn test -Dtest=TestInstancesAccessor,TestMaintenanceManagementService,TestInstanceValidationUtilInRest,TestPerInstanceAccessor,TestCustomRestClient,TestClusterService -pl helix-rest && mvn test -Dtest=TestInstanceValidationUtil -pl helix-core

Changes that Break Backward Compatibility (Optional)

• My PR contains changes that break backward compatibility or previous assumptions for certain methods or API. They include:

(Consider including all behavior changes for public methods or API. Also include these changes in merge description so that other developers are aware of these changes. This allows them to make relevant code changes in feature branches accounting for the new method/API behavior.)

Documentation (Optional)

• In case of new functionality, my PR adds documentation in the following wiki page:

(Link the GitHub wiki you added)

Commits

• My commits all reference appropriate Apache Helix GitHub issues in their subject lines. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters (not including Jira issue reference)
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Code Quality

• My diff has been formatted using helix-style.xml
  (helix-style-intellij.xml if IntelliJ IDE is used)

[xyuanlu]

LGTM. Some minor style issue.

[xyuanlu]

LGTM! some nit.

[MarkGaox]

PR approved by @xyuanlu. TFTR. Final commit message: "Support Stoppable Check for Non-Topology-Aware Clusters"