Add Support for custom_headers to OAuth2 social connections.

[asce1062]

Checklist

• I agree to the terms within the Auth0 Code of Conduct.

Describe the problem you'd like to have solved

We have configured Custom Headers on an oauth2 connection in Auth0:

{
  "X-Token-Type": "JWT"
}

, which gets cleared when we apply the Auth0 terraform on the tenant.

This is happening even though there seems to be no configuration attribute for custom headers in the Terraform options for the Auth0 connection.

Describe the ideal solution

We'd like to be able to setup custom_headers via terraform auth0_connection resource.

Alternatives and current workarounds

No response

Additional context

No response