Migrate client transports to Apache HttpClient / Core 5.x

[reta]

Signed-off-by: Andriy Redko [email protected]

Description

Migrate client transports to Apache HttpClient / Core 5.x

Issues Resolved

Closes #2171 and #2165

Testing

Existing tests do cover the change

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

Merging #2172 (d42a66c) into main (16b1676) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #2172      +/-   ##
============================================
+ Coverage     61.12%   61.18%   +0.05%     
- Complexity     3236     3237       +1     
============================================
  Files           258      258              
  Lines         18110    18125      +15     
  Branches       3224     3224              
============================================
+ Hits          11070    11089      +19     
+ Misses         5461     5459       -2     
+ Partials       1579     1577       -2     

Impacted Files	Coverage Δ
...org/opensearch/security/httpclient/HttpClient.java	87.09% <100.00%> (+1.21%)	⬆️
...a/org/opensearch/security/tools/SecurityAdmin.java	36.37% <100.00%> (+0.61%)	⬆️
...ecurity/ssl/rest/SecuritySSLReloadCertsAction.java	84.78% <0.00%> (-0.33%)	⬇️
...opensearch/security/ssl/util/SSLRequestHelper.java	65.71% <0.00%> (+1.90%)	⬆️
...ttp/netty/SecuritySSLNettyHttpServerTransport.java	84.21% <0.00%> (+5.26%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[peternied]

Thanks for taking this on, it looks like @cwperks might have fixed some of the issues that are impacting the tests, maybe take a quick look at #2166

As soon as CI is passing I'll be signing off, thanks for dedicating time to this

[reta]

Closing in favor of #2166