Declarative config ref descriptions

[jack-berg]

Currently jsonschema2Pojo annotated generated content with property descriptions inconsistently:

• Sometimes the getters get javadoc, other times not (!!)
• Sometimes fields get javadoc, other times not (!!)
• Sometimes fields get the descriptions duplicated in @JsonPropertyDescription, other times not (!!)

This inconsistency is frustrating to me. This PR updates the generation logic to:

• Only add javadoc description on getters
• Fields get nothing: no javadoc, no @JsonPropertyDescription
• Format the descriptions such that line breaks have new <p>
• Omit the (Required) added to required properties by jsonschema2Pojo - opentelemetry-configuration has build tooling that automatically include this information in descriptions so its purely duplicative

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.95%. Comparing base (104d56e) to head (c6bfa97).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8540      +/-   ##
============================================
+ Coverage     90.93%   90.95%   +0.01%     
- Complexity    10209    10210       +1     
============================================
  Files          1013     1013              
  Lines         27175    27176       +1     
  Branches       3184     3184              
============================================
+ Hits          24712    24718       +6     
+ Misses         1735     1731       -4     
+ Partials        728      727       -1     

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