Add isActionPaginated to DelegatingRestHandler

[cwperks]

Description

This PR fixes a test failure in DelegatingRestHandlerTests after the RestHandler interface was changed in opensearch-project/OpenSearch#14718 to add a new method called isActionPaginated

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

Maintenance

Check List

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

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.62%. Comparing base (9c5e32a) to head (f9cbbde).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4763      +/-   ##
==========================================
- Coverage   65.63%   65.62%   -0.02%     
==========================================
  Files         321      321              
  Lines       22538    22539       +1     
  Branches     3611     3611              
==========================================
- Hits        14793    14791       -2     
- Misses       5932     5939       +7     
+ Partials     1813     1809       -4     

Files with missing lines	Coverage Δ
...nsearch/security/filter/DelegatingRestHandler.java	93.75% <100.00%> (+0.41%)	⬆️

... and 4 files with indirect coverage changes