ImmutableOpenMap removal compile fix

[petardz]

Issue #, if available:

Description of changes:

CheckList:

• Commits are signed per the DCO using --signoff

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[codecov-commenter]

Codecov Report

Merging #766 (fdaa2d8) into main (19fc44b) will decrease coverage by 0.24%.
The diff coverage is 62.50%.

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@@             Coverage Diff              @@
##               main     #766      +/-   ##
============================================
- Coverage     75.58%   75.35%   -0.24%     
+ Complexity     2680     2661      -19     
============================================
  Files           337      337              
  Lines         15562    15562              
  Branches       2286     2286              
============================================
- Hits          11763    11727      -36     
- Misses         2462     2492      +30     
- Partials       1337     1343       +6     

Impacted Files	Coverage Δ
...ndexstatemanagement/IndexStateManagementHistory.kt	77.24% <0.00%> (ø)
...agement/indexstatemanagement/ManagedIndexRunner.kt	47.13% <0.00%> (-0.45%)	⬇️
.../rollup/util/RollupFieldValueExpressionResolver.kt	61.53% <0.00%> (ø)
...atemanagement/step/shrink/AttemptMoveShardsStep.kt	57.70% <50.00%> (ø)
...atemanagement/step/shrink/WaitForMoveShardsStep.kt	49.23% <75.00%> (ø)
...management/indexstatemanagement/MetadataService.kt	64.92% <100.00%> (ø)
...temanagement/opensearchapi/OpenSearchExtensions.kt	71.60% <100.00%> (ø)
...exstatemanagement/step/shrink/WaitForShrinkStep.kt	42.00% <100.00%> (ø)
...transport/action/explain/TransportExplainAction.kt	70.75% <100.00%> (ø)
...arch/indexmanagement/rollup/RollupMapperService.kt	58.58% <100.00%> (ø)
... and 1 more

... and 17 files with indirect coverage changes

[xluo-aws]

There is another PR opensearch-project/notifications#663 to bump the gradle version to 8.1.1

[petardz]

8.1.1 didn't work for me. I got licence file issues and few more

[petardz]

Ah nevermind.. something changed again in meanwhile. 7.6.1 is not working anymore

[yuye-aws]

Hi, DCO shows that the sign-off is missing in two of your commits. Please follow the instructions to add your sign-off, thanks!

[yuye-aws]

It is good to see you making new commits, but you need to add sign-off to each of your commit. For more details, you can refer to instructions listed in DCO tests.

[yuye-aws]

Great, your commit has passed the DCO test! I am here to notifying you of some recent changes on the the main repository. A pull request has just been approved, which includes some fixes with ImmutableOpenMap removal issue. I assume there is some overlapping with your code changes. Also, the conflicts need to be resolved. You can take a look at the latest commit for detailed information.

[petardz]

It is good to see you making new commits, but you need to add sign-off to each of your commit. For more details, you can refer to instructions listed in DCO tests.

oops.. fixed it!

yea I saw @bowenlan-amzn PR

[bowenlan-amzn]

Probably no need for this ImmutableOpenMap change. Can proceed to work on the bug fix. Thanks!