Previously the timeout was not set in the client's constructor, thus the
zero value was used. The client did not wait for invalidation.
To prevent this in the future a warning is logged if wait is disabled.
Co-authored-by: Daniel Weiße <dw@edgeless.systems>
* rename to attestationconfigapi + put client and fetcher inside pkg
* rename api/version to versionsapi and put fetcher + client inside pkg
* rename AttestationConfigAPIFetcher to Fetcher
