New ECM should be add to the last of the choice array.

[Alexkun]

What is the purpose of the change

#2242

1. add NewECMStandbyRule

Brief change log

(for example:)

• Define the NewECMStandbyRule in the linkis-applicationmanager module.

Verifying this change

(Please pick either of the following options)
This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• Anything that affects deployment: (no)
• The MGS(Microservice Governance Services), i.e., Spring Cloud Gateway, OpenFeign, Eureka.: (no)

Documentation

• Does this pull request introduce a new feature? (yes)
• If yes, how is the feature documented? (docs)

[peacewong]

LGTM.

[codecov]

Codecov Report

Merging #2243 (16b2806) into dev-1.1.3 (adfc902) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##             dev-1.1.3    #2243      +/-   ##
===============================================
- Coverage        20.14%   20.13%   -0.02%     
  Complexity        1005     1005              
===============================================
  Files              425      426       +1     
  Lines            12926    12935       +9     
  Branches          2035     2037       +2     
===============================================
  Hits              2604     2604              
- Misses            9977     9986       +9     
  Partials           345      345              

Impacted Files	Coverage Δ
...inkis/jobhistory/conversions/TaskConversions.scala	8.37% <0.00%> (-0.20%)	⬇️
...rnance/common/constant/job/TaskInfoConstants.scala	0.00% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update adfc902...16b2806. Read the comment docs.