[identity][terraform] Add error type for HTTP logs

Summary:
It's good to distinguish errors coming from HTTP server

Depends on D12304

Test Plan:

• errorType=HTTP is shown in logs when deliberately malfolmed response json
• terraform plan shows resources added

Reviewers: will

Reviewed By: will

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D12305