Domain proxy standalone improvements

[tecarter94]

Make byte buffer size configurable. Add configurable whitelist of proxy targets. Factor out common IO code. Switch to using Vert.x server. Add support for HTTPS. Handle exceptions seen when connection dies between client and server. Refactored domain proxy in general for consistency.

https://issues.redhat.com/browse/JBS-23

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[tecarter94]

Unit tests still need to be added.

[codecov]

Codecov Report

Attention: Patch coverage is 46.89655% with 77 lines in your changes missing coverage. Please review.

Project coverage is 44.04%. Comparing base (6beffb2) to head (f5dd234).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
.../redhat/hacbs/domainproxy/common/CommonIOUtil.java	0.00%	47 Missing ⚠️
...edhat/hacbs/domainproxy/ExternalProxyVerticle.java	74.32%	13 Missing and 6 partials ⚠️
...om/redhat/hacbs/domainproxy/DomainProxyServer.java	47.61%	11 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2199      +/-   ##
============================================
+ Coverage     43.97%   44.04%   +0.06%     
- Complexity      795      811      +16     
============================================
  Files           275      276       +1     
  Lines         13396    13464      +68     
  Branches       1356     1360       +4     
============================================
+ Hits           5891     5930      +39     
- Misses         6889     6912      +23     
- Partials        616      622       +6     

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[tecarter94]

/test all