feat: Injectable request

[nick-penaranda-ck]

Description

Add an optional requestImpl to HttpConnection constructor to allow users to provide their own request implementation. By default, the normal request module will be used.

Motivation and Context

Allowing request to be injected is useful for various instrumentation tasks like adding/modifying headers, timing, and faciliating integrations that rely on wrapping request.

How Has This Been Tested?

A new test case was added to thrift-integration.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.