Remove whitelist settings in favor of allowlist

[shikharj05]

Description

• Category (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation)
  Maintenance
• Why these changes are required?
  Removal of non-inclusive keywords from OpenSearch - https://opensearch.org/docs/latest/breaking-changes/#deprecate-non-inclusive-terms. Aligned with Change the "Blacklist / Whitelist" nomenclature OpenSearch#1483
• What is the old behavior before changes and new behavior after changes?

Is this a backport? If so, please add backport PR # and/or commits #, and remove backport-failed label from the original PR.

Do these changes introduce new permission(s) to be displayed in the static dropdown on the front-end? If so, please open a draft PR in the security dashboards plugin and link the draft PR here

Testing

[Please provide details of testing done: unit testing, integration testing and manual testing]

Check List

• [] New functionality includes testing
• New functionality has been documented
• [NA] New Roles/Permissions have a corresponding security dashboards plugin PR
• [NA] API changes companion pull request created
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.70%. Comparing base (da21abf) to head (f0b91b3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5224      +/-   ##
==========================================
- Coverage   71.70%   71.70%   -0.01%     
==========================================
  Files         337      335       -2     
  Lines       22789    22736      -53     
  Branches     3606     3596      -10     
==========================================
- Hits        16341    16302      -39     
+ Misses       4650     4639      -11     
+ Partials     1798     1795       -3     

Files with missing lines	Coverage Δ
...ty/configuration/ConfigurationLoaderSecurity7.java	70.24% <100.00%> (ø)
...ecurity/configuration/ConfigurationRepository.java	79.84% <ø> (-0.08%)	⬇️
...rg/opensearch/security/dlic/rest/api/Endpoint.java	100.00% <ø> (ø)
...security/dlic/rest/api/SecurityRestApiActions.java	80.00% <ø> (ø)
...opensearch/security/filter/SecurityRestFilter.java	85.07% <100.00%> (-0.44%)	⬇️
...ch/security/securityconf/DynamicConfigFactory.java	62.32% <ø> (-0.18%)	⬇️
...g/opensearch/security/securityconf/impl/CType.java	93.02% <ø> (-0.16%)	⬇️
...nsearch/security/support/SecurityIndexHandler.java	93.39% <100.00%> (-0.13%)	⬇️
...a/org/opensearch/security/tools/SecurityAdmin.java	48.51% <ø> (+0.17%)	⬆️

... and 4 files with indirect coverage changes

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