Add more HTTP Request task full plugin Examples

[anna-geller]

Description

Currently, there is not a single example that would be using Content-Type: application/json (only multipart form data) for the HTTP Request task.

• [ ] add more realistic examples as full plugin examples
• [ ] use multiple content types and multiple authentication methods to show different usage patterns

[anna-geller]

part https://github.com/kestra-io/kestra/commit/7411c6d12e8e981ddfb298c7093b1e9c8924048f

[wrussell1999]

@shrutimantri A few that we should make examples for:

• [x] Image type example (e.g. image/jpeg) to show how someone could upload an image generated from a previous task (maybe a download from S3 or Google Drive?)
• [x] text/csv example to show how you could upload a CSV file that was generated from a previous task (like download
• [x] Example authenticating with a JWT
• [x] Example authenticating an API key in the header

If you can't find real websites that allow you to test making requests, we can use a dummy URL so that people get the idea. The key thing is showing people how they would format these types of examples inside of the task.