[Placeholder] BWC Tests for DLS/FLS

[parasjain1]

Description

Updated BWCs and need them to run in GitHub CI actions. This is for the issue mentioned below.

Issues Resolved

#3053

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
• 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.
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[codecov]

Codecov Report

Merging #3054 (4dfdb2c) into main (7f6944c) will increase coverage by 0.21%.
Report is 10 commits behind head on main.
The diff coverage is 77.23%.

@@             Coverage Diff              @@
##               main    #3054      +/-   ##
============================================
+ Coverage     64.24%   64.45%   +0.21%     
- Complexity     3491     3534      +43     
============================================
  Files           264      268       +4     
  Lines         20157    20354     +197     
  Branches       3365     3374       +9     
============================================
+ Hits          12949    13119     +170     
- Misses         5527     5541      +14     
- Partials       1681     1694      +13     

Files	Coverage Δ
.../main/java/com/amazon/dlic/auth/ldap/LdapUser.java	89.28% <100.00%> (+3.57%)	⬆️
.../opensearch/security/OpenSearchSecurityPlugin.java	84.62% <100.00%> (+0.02%)	⬆️
...earch/security/auditlog/impl/AbstractAuditLog.java	76.59% <100.00%> (+0.10%)	⬆️
...ava/org/opensearch/security/auth/UserInjector.java	90.66% <100.00%> (+0.66%)	⬆️
...org/opensearch/security/filter/SecurityFilter.java	66.19% <100.00%> (+0.32%)	⬆️
.../org/opensearch/security/support/Base64Helper.java	90.90% <100.00%> (+23.63%)	⬆️
...g/opensearch/security/support/ConfigConstants.java	95.00% <ø> (ø)
...rch/security/transport/SecurityRequestHandler.java	55.03% <100.00%> (+0.30%)	⬆️
...c/main/java/org/opensearch/security/user/User.java	71.95% <100.00%> (+15.70%)	⬆️
.../org/opensearch/security/support/HeaderHelper.java	56.25% <50.00%> (-3.75%)	⬇️
... and 7 more

... and 7 files with indirect coverage changes

[stephen-crawford]

Going to convert this to a draft while debugging is in progress. Thank you for your efforts @parasjain1

[peternied]

@parasjain1 I'm going to close out this PR since your contribution included these changes - thanks!