[FEATURE] tags on model group

[wujunshen]

see #1303

[codecov]

Codecov Report

Merging #1370 (17822b6) into 2.x (2c8cc02) will decrease coverage by 0.15%.
The diff coverage is 42.85%.

@@             Coverage Diff              @@
##                2.x    #1370      +/-   ##
============================================
- Coverage     78.35%   78.20%   -0.15%     
- Complexity     2275     2278       +3     
============================================
  Files           190      190              
  Lines          9286     9314      +28     
  Branches        910      918       +8     
============================================
+ Hits           7276     7284       +8     
- Misses         1599     1616      +17     
- Partials        411      414       +3     

Flag	Coverage Δ
ml-commons	78.20% <42.85%> (-0.15%)	⬇️

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

Files Changed	Coverage Δ
...n/model_group/TransportUpdateModelGroupAction.java	70.58% <30.43%> (-7.11%)	⬇️
...model_group/TransportRegisterModelGroupAction.java	100.00% <100.00%> (ø)
...a/org/opensearch/ml/model/MLModelGroupManager.java	83.89% <100.00%> (+0.27%)	⬆️

... and 1 file with indirect coverage changes

[zane-neo]

Do not change the format of this file, the format change caused a lot of differences.