Support Run Tasks Integration API

[karvounis-form3]

Use-cases

Users want to create custom TFE run tasks. However, it seems that the Golang structs, and functions that support this are missing from this repo. This is the API docs for Run Tasks Integration API. This leads to users writing their own implementation, which can differ and lead to mistakes, bugs, and slower development cycle.

Attempted Solutions

It was attempted to write our own structs, functions etc but I believe the whole community would benefit if those were supported in this official Golang client.

Proposal

Support the following:

• Run task request struct. This way, the consumers of the call coming from TFC/E will not have to create their own struct
• Run Task Callback
  • Request body struct
  • Outcomes Payload Body struct
  • Function that sends a PATCH request with the above payload back to the TFC/E callback URL