Pass resourceType instead of resourceIndex to resourceSharingClient

[cwperks]

Description

This PR is related to the changes in opensearch-project/security#5713 to support multiple resource types in the same index. There's a small change in all ResourceSharingClient methods to accept type in the place of index.

resource type <-> resource index is a many-to-one relationship (think dashboards saved objects where multiple saved object types are in the same index).

On another note, ResourceSharingClient is used in instances where a mechanism doesn't currently exist as in parent<->child relationships (like a detector and results where all results are associated with a detector). Security is working on a mechanism to support this natively to obviate the need for ResourceSharingClient and instead abstract all the logic behind-the-scenes to the security plugin.

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[rithin-pullela-aws]

Known Flaky tests:

Tests with failures:
 - org.opensearch.ml.action.execute.ExecuteITTests.testExecuteLocalSampleCalculator
 - org.opensearch.ml.action.models.SearchModelTransportActionTests.test_RSC_featureEnabled_typeEnabled_callsGetAccessibleIds
 - org.opensearch.ml.action.prediction.PredictionITTests.testPredictionWithDataFrame_LinearRegression
 - org.opensearch.ml.action.prediction.PredictionITTests.testPredictionWithSearchInput_LogisticRegression
 - org.opensearch.ml.action.prediction.PredictionITTests.testPredictionWithDataFrame_FitRCF
 - org.opensearch.ml.action.prediction.PredictionITTests.testPredictionWithDataFrame_BatchRCF
 - org.opensearch.ml.action.prediction.PredictionITTests.testPredictionWithoutDataset_KMeans
 - org.opensearch.ml.action.trainpredict.TrainAndPredictITTests.testTrainAndPredict_BatchRCF
 - org.opensearch.ml.action.trainpredict.TrainAndPredictITTests.testTrainAndPredictWithEmptyDataset_KMeans
 - org.opensearch.ml.action.models.SearchModelITTests.test_all
 - org.opensearch.ml.utils.IndexUtilsTests.testGetIndexHealth_Alias
 - org.opensearch.ml.utils.IndexUtilsTests.testGetIndexHealth_Index