Add allowlist configuration and deprecate whitelist

[cliu123]

Description

• Category (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation) Refactoring

Issues Resolved

#1665

Testing

UTs

Check List

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[codecov-commenter]

Codecov Report

Merging #1808 (71f0eff) into main (e189b7a) will decrease coverage by 0.06%.
The diff coverage is 56.86%.

@@             Coverage Diff              @@
##               main    #1808      +/-   ##
============================================
- Coverage     60.81%   60.74%   -0.07%     
- Complexity     3187     3205      +18     
============================================
  Files           253      256       +3     
  Lines         17931    18016      +85     
  Branches       3204     3210       +6     
============================================
+ Hits          10904    10944      +40     
- Misses         5450     5490      +40     
- Partials       1577     1582       +5     

Impacted Files	Coverage Δ
...rg/opensearch/security/securityconf/Migration.java	53.33% <0.00%> (-4.33%)	⬇️
...a/org/opensearch/security/tools/SecurityAdmin.java	37.31% <0.00%> (-0.19%)	⬇️
...curity/securityconf/impl/AllowlistingSettings.java	33.33% <33.33%> (ø)
...ch/security/securityconf/DynamicConfigFactory.java	56.05% <66.66%> (+0.78%)	⬆️
...rch/security/dlic/rest/api/AllowlistApiAction.java	74.19% <74.19%> (ø)
...opensearch/security/filter/SecurityRestFilter.java	76.19% <75.00%> (-0.48%)	⬇️
...ty/configuration/ConfigurationLoaderSecurity7.java	65.57% <100.00%> (ø)
...ecurity/configuration/ConfigurationRepository.java	72.13% <100.00%> (-2.05%)	⬇️
...rg/opensearch/security/dlic/rest/api/Endpoint.java	100.00% <100.00%> (ø)
...security/dlic/rest/api/SecurityRestApiActions.java	94.73% <100.00%> (+0.29%)	⬆️
... and 9 more

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[peternied]

Thanks for working on that last round of feedback and I've done a pass over the new test code.

[peternied]

Great improvements all around, thanks for the dedication @cliu123!