ENG-16503 Show request body for x-www-form-urlencoded HTTP requests

[bradAtTraceable]

Description

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Testing

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Checklist:

• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] Any dependent changes have been merged and published in downstream modules

Documentation

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[bradAtTraceable]

Implemented the ability to capture request bodies for HTTP requests in the x-www-form-urlencoded format.