[Backport 2.x] Standardize snapshot indices parsing so that combinations of included and excluded indices are treated the same regardless of the order they are listed in

[opensearch-trigger-bot]

Backport 57d4485 from #5626.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/8748/
• CommitID: fa6f58f

[codecov-commenter]

Codecov Report

Merging #5683 (fa6f58f) into 2.x (934600f) will increase coverage by 0.16%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                2.x    #5683      +/-   ##
============================================
+ Coverage     70.57%   70.74%   +0.16%     
- Complexity    58615    58732     +117     
============================================
  Files          4740     4740              
  Lines        280522   280526       +4     
  Branches      40883    40883              
============================================
+ Hits         197982   198454     +472     
+ Misses        66113    65663     -450     
+ Partials      16427    16409      -18     

Impacted Files	Coverage Δ
...n/java/org/opensearch/snapshots/SnapshotUtils.java	88.05% <100.00%> (+0.75%)	⬆️
...port/ResponseHandlerFailureTransportException.java	0.00% <0.00%> (-60.00%)	⬇️
...cluster/coordination/PendingClusterStateStats.java	20.00% <0.00%> (-48.00%)	⬇️
.../java/org/opensearch/search/dfs/AggregatedDfs.java	51.61% <0.00%> (-45.17%)	⬇️
...opensearch/persistent/PersistentTasksExecutor.java	22.22% <0.00%> (-44.45%)	⬇️
...earch/client/indices/GetIndexTemplatesRequest.java	46.15% <0.00%> (-38.47%)	⬇️
...pensearch/action/ingest/DeletePipelineRequest.java	31.25% <0.00%> (-37.50%)	⬇️
...ava/org/opensearch/search/dfs/DfsSearchResult.java	43.26% <0.00%> (-35.58%)	⬇️
...min/cluster/snapshots/get/GetSnapshotsRequest.java	52.63% <0.00%> (-31.58%)	⬇️
...ensearch/discovery/InitializeExtensionRequest.java	0.00% <0.00%> (-30.00%)	⬇️
... and 504 more

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