feat(instrumentation): Add instrument support for HTTPX

[ghost]

Fixes #2283

• PR name follows conventional commits format: feat(instrumentation): ... or fix(instrumentation): ....
• (If applicable) I have updated the documentation accordingly.

TODOs/Questions:

• If adding a new instrumentation or changing an existing one, I've added screenshots from some observability platform showing the change. Is this needed for this PR?
• HTTPX instrumentor from OpenTelemetry does not support excluded URLs at the moment. Do you think we should open an issue there and push a fix?

[CLAassistant]

All committers have signed the CLA.

[nirga]

Hey @whoiskrtk2, thanks! I was waiting for you to mark it as ready for review :)
Given the fact there isn't a way to exclude URLs - I'd at least test and see what spans we get for some of our test apps and put those screenshots here. And yes, we should open an issue there I think.