Log Jira connect request schema if invalid request error
In #352411 we try to reduce the number of errors when sending data to Jira via the GitLab for Jira app.
One error we often see is "invalid request" but we can't tell why the request was invalid because requests are not logged. To learn more about the error, we can introduce logging of the request body.
In order not to log sensitive information, we can start by logging only the JSON schema and not the values.