cherrypick Code Refactoring for CommonName to main

[kaituo]

Description

cherrypick #867 to main branch. Will merge PR to main branch in the future and hide forecasting functionality under a feature flag until it is ready for release.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[sudiptoguha]

This makes sense at the moment. But with forecasting added, eventually there will be a question of ADCommonName being appropriate. But that bridge can be crossed once one arrives at it ....

[kaituo]

yes :)

[codecov]

Codecov Report

Merging #901 (ecc6f1e) into main (e2fee9d) will decrease coverage by 0.09%.
The diff coverage is 81.34%.

@@             Coverage Diff              @@
##               main     #901      +/-   ##
============================================
- Coverage     79.52%   79.44%   -0.09%     
+ Complexity     4313     4306       -7     
============================================
  Files           306      308       +2     
  Lines         18091    18094       +3     
  Branches       1889     1889              
============================================
- Hits          14387    14374      -13     
- Misses         2800     2814      +14     
- Partials        904      906       +2     

Flag	Coverage Δ
plugin	79.44% <81.34%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../java/org/opensearch/ad/cluster/ADVersionUtil.java	93.33% <ø> (ø)
.../main/java/org/opensearch/ad/cluster/HashRing.java	81.78% <ø> (ø)
.../java/org/opensearch/ad/constant/ADCommonName.java	75.00% <0.00%> (ø)
...rg/opensearch/ad/constant/CommonErrorMessages.java	98.33% <ø> (ø)
...c/main/java/org/opensearch/ad/indices/ADIndex.java	100.00% <ø> (ø)
.../java/org/opensearch/ad/model/AnomalyDetector.java	92.30% <ø> (ø)
...va/org/opensearch/ad/model/AnomalyDetectorJob.java	80.46% <ø> (ø)
src/main/java/org/opensearch/ad/model/Entity.java	85.04% <ø> (ø)
...ensearch/ad/rest/RestGetAnomalyDetectorAction.java	38.46% <0.00%> (ø)
...rg/opensearch/ad/rest/RestSearchADTasksAction.java	100.00% <ø> (ø)
... and 67 more

... and 2 files with indirect coverage changes

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.x 2.x
# Navigate to the new working tree
cd .worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-901-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 041d6ce73d37f1697013b2d2f0683fbfe012247c
# Push it to GitHub
git push --set-upstream origin backport/backport-901-to-2.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-901-to-2.x.