Revert "Rest admin permissions (#2411) (#2466)"

[willyborankin]

Description

This PR reverts REST admin permission feature due to additional testing it needs to pass through.

Issues Resolved

Resolved #2633

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.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 77.41935% with 28 lines in your changes missing coverage. Please review.

Project coverage is 61.06%. Comparing base (7356d9e) to head (bd17756).
Report is 623 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
.../security/ssl/rest/SecuritySSLCertsInfoAction.java	61.11%	13 Missing and 8 partials ⚠️
...ecurity/ssl/rest/SecuritySSLReloadCertsAction.java	85.10%	4 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #2636      +/-   ##
============================================
- Coverage     61.25%   61.06%   -0.20%     
+ Complexity     3310     3251      -59     
============================================
  Files           258      258              
  Lines         18272    18147     -125     
  Branches       3251     3233      -18     
============================================
- Hits          11193    11081     -112     
+ Misses         5503     5493      -10     
+ Partials       1576     1573       -3     

Files with missing lines	Coverage Δ
.../opensearch/security/OpenSearchSecurityPlugin.java	79.95% <100.00%> (+0.08%)	⬆️
...arch/security/dlic/rest/api/AbstractApiAction.java	76.09% <100.00%> (-0.08%)	⬇️
...earch/security/dlic/rest/api/AccountApiAction.java	82.35% <ø> (+1.19%)	⬆️
.../security/dlic/rest/api/ActionGroupsApiAction.java	88.46% <100.00%> (+2.35%)	⬆️
...rch/security/dlic/rest/api/AllowlistApiAction.java	74.19% <ø> (-0.81%)	⬇️
...nsearch/security/dlic/rest/api/AuditApiAction.java	63.82% <ø> (-0.76%)	⬇️
...curity/dlic/rest/api/AuthTokenProcessorAction.java	57.14% <ø> (+3.80%)	⬆️
...rg/opensearch/security/dlic/rest/api/Endpoint.java	100.00% <100.00%> (ø)
...ch/security/dlic/rest/api/FlushCacheApiAction.java	63.33% <ø> (+2.04%)	⬆️
...security/dlic/rest/api/InternalUsersApiAction.java	83.78% <ø> (-0.22%)	⬇️
... and 16 more

... and 6 files with indirect coverage changes

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