Add optional Proxy configuration to the "Make HTTP Request" Action

**Is your feature request related to a problem? Please describe.**
There is a relatively high occurrence of requiring a proxy when making 3rd party HTTP API requests. It would great to have the ability to optionally configure proxy settings when making an HTTP request.

**Describe the solution you'd like**
Add optional parameter section/group in the "Make HTTP Request" Action so users can easily specify a proxy and authentication if required. If proxy information is present the proxy would be used in the Request.

**Do you have a workaround?**
The current workaround is to use the Proxy example in the documentation. Unfortunately, this creates additional maintenance if something needs to change and it's bespoke to the single account. Having a universal solution allows everyone to benefit from the use and testing of the action.

**Comparable features in other tools?**
Yes, this is a very standard workflow. You can make HTTP calls through a proxy in most of the modern languages as well as cURL and Postman.

**Additional context**
Nothing to add.