Support for PagerDuty Apps Oauth scoped token

[imjaroiswebdev]

This update brings support for using Scoped Oauth Token as mechanism to authenticate API calls to PagerDuty public APIs.

It will add the following way of setting up the http client for making API calls:

• Use of a PagerDuty App credentials to ask for a new token on the fly.

To specify which type of token will be utilized to issue the API calls, You have to set the attribute api_token_type in the Provider configuration (Defaults to apiToken) as follow:

provider "pagerduty" {
  # Configure use of App Oauth scoped token
  use_app_oauth_scoped_token {
    pd_client_id     = var.pd_client_id
    pd_client_secret = var.pd_client_secret
    pd_subdomain     = var.pd_subdomain
  }
}

Breaking Change

• Makes Provider token optional. Previously it was required.

Depends on: heimweh/go-pagerduty#136