Fixed path serialization issue

[akulyakhtin]

Jackson serializes paths as absolute paths.
Creating URL from absolute path fails on WIndows because of the drive letter followed by a column in absolute path.

Because of this tests HttpMultipartTest.testToByteArrays and HttpProcessorTest.shouldReturnAnObjectWhenMethodIsAnnotatedWithMultipart failed.

Also some simple-open-ai functionality was broken as indicated in sashirestela/simple-openai#133

This fix uses URIs instead of URL.

Best regards,
Alex

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 95.90%. Comparing base (ac67bd9) to head (d75a717).

Files	Patch %	Lines
...shirestela/cleverclient/support/HttpMultipart.java	66.66%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff            @@
##               main      #72   +/-   ##
=========================================
  Coverage     95.89%   95.90%           
  Complexity      295      295           
=========================================
  Files            35       35           
  Lines           804      805    +1     
  Branches         74       74           
=========================================
+ Hits            771      772    +1     
  Misses           18       18           
  Partials         15       15           

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