Add support for Request IDs (RSC7c)

[vladvelici]

It would be very useful when debugging certain support requests to add Request IDs to REST requests.

It's in the spec at RSC7c and TO3p. An new option addRequestIds bool should be in ClientOptions (and default to false). When set to true, the SDK adds a random request_id query string to requests.

For support it would be super useful to include those request IDs in error logs where available.

┆Issue is synchronized with this Jira Task by Unito