refactor(core): Abstract away InstanceSettings and encryptionKey into injectable services (no-changelog) (#7471)

This change ensures that things like `encryptionKey` and `instanceId`
are always available directly where they are needed, instead of passing
them around throughout the code.

packages/cli/src/AbstractServer.ts

@@ -45,8 +45,6 @@ export abstract class AbstractServer {
 
 	protected endpointWebhookWaiting: string;
 
-	protected instanceId = '';
-
 	protected webhooksEnabled = true;
 
 	protected testWebhooksEnabled = false;