Support to manage Synthetic endpoints

[gessnerfl]

Story

I want to be able to configure synthetic endpoints
So that I can manage synthetic endpoint configurations consistently across tenants

Technical Details

Synthetic endpoints are managed globally within a tenant (Applications -> Services -> Configure Services -> Synthetic Endpoints. To provide an option to configure this endpoints also through infrastructure code the provider should be extended by this feature.
https://instana.github.io/openapi/#operation/getSyntheticCalls

[jonassiefker]

All synthetic endpoints are managed globally with single requests, which would require lists of nested objects in the terraform resource. There currently does not seem to be a feasible way to do this.

[gessnerfl]

Closing due to limited API capabilities