[FEATURE] Add proxy options to HTTP pipeline

**Is your feature request related to a problem? Please describe.**
Some domains are geolocation-blocked. So we need to pass proxy options to bypass that.

**Describe the solution you'd like**
Add proxy options to HTTP pipeline: server, auth, etc.

**Do you have a workaround?**
Use [Making HTTP Requests with Python - Pipedream](https://pipedream.com/docs/code/python/http-requests#using-an-http-proxy-to-proxy-requests-through-another-host)

**Comparable features in other tools?**
`curl --proxy`

**Additional context**
Discussion here: https://pipedream-users.slack.com/archives/CN1BUB92B/p1721048549858149