* Alerting: Implement SaveAndApplyDefaultConfig in the remote Alertmanager struct
* send the hash of the encrypted configuration
* tests, default config hash in AM struct
* add missing default config to test
* restore build directory
* go work file...
* fix broken test
* remove unnecessary conversion to []byte
* go work again...
* make things work again with latest main branch changes
* update error messages in tests for decrypting config