Include error JSON in CTMS errors

CTMS reports failed statuses with raise_for_status, like:

Lines 569 to 571 in ce94394

    
           resp = self.session.patch(f"/ctms/{email_id}", json=data) 
        
           resp.raise_for_status() 
        
           return resp.json()

In Sentry, this reports:

The status code (such as 422)
The reason (such as "Unprocessable Entity")
A summary message (such as "422 Client Error: Unprocessable Entity for url: https://ctms.stage.mozilla-ess.mozit.cloud/ctms/{email_id}"

For a 422 and other errors, the JSON body of the response also has information, which is useful for diagnosing the error, and should be included in the context sent to Sentry

	resp = self.session.patch(f"/ctms/{email_id}", json=data)
	resp.raise_for_status()
	return resp.json()