Revert "Allow skipping hot reload dn validation (#4752)"

[cwperks]

This reverts commit c8cacf1.

Description

This PR reverts #4752 on the main branch. Reverting this PR for now because it has conflicts with #4671 and needs to be adapted to the SSL refactor.

Currently, the main branch has failing CI so reverting this PR will ensure we can merge other PRs.

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

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

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 69.87%. Comparing base (eb7f821) to head (fecbf34).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ensearch/security/ssl/DefaultSecurityKeyStore.java	20.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4840      +/-   ##
==========================================
+ Coverage   69.82%   69.87%   +0.05%     
==========================================
  Files         320      320              
  Lines       21661    21661              
  Branches     3456     3456              
==========================================
+ Hits        15124    15136      +12     
+ Misses       4742     4737       -5     
+ Partials     1795     1788       -7     

Files with missing lines	Coverage Δ
...arch/security/ssl/OpenSearchSecuritySSLPlugin.java	87.02% <ø> (ø)
...ensearch/security/ssl/util/SSLConfigConstants.java	79.16% <ø> (ø)
...ensearch/security/ssl/DefaultSecurityKeyStore.java	26.48% <20.00%> (ø)

... and 9 files with indirect coverage changes