Fix idn-hostname format and update json schema test suite

[justin-tay]

This fixes idn-hostname format to recognise all the label separator characters in https://datatracker.ietf.org/doc/html/rfc3490#section-3.1.

This also updates the JSON Schema Test Suite to ensure that the tests all pass particularly the tests introduced for this

• Add test cases for other valid label separators in IDN hostnames json-schema-org/JSON-Schema-Test-Suite#760

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 78.43%. Comparing base (48ca3c2) to head (33110c8).
⚠️ Report is 97 commits behind head on master.

Files with missing lines	Patch %	Lines
...com/networknt/schema/format/IdnHostnameFormat.java	0.00%	0 Missing and 1 partial ⚠️
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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1191      +/-   ##
============================================
- Coverage     78.90%   78.43%   -0.47%     
- Complexity     1965     2087     +122     
============================================
  Files           172      201      +29     
  Lines          6352     6882     +530     
  Branches       1255     1260       +5     
============================================
+ Hits           5012     5398     +386     
- Misses          867     1014     +147     
+ Partials        473      470       -3     

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