feat(console): add new step to activate SMTP provider (#7956)

# Which Problems Are Solved

- In #7929 it was detected that it would be better to show the
activate/deactivate action for a SMTP configuration in the wizard as for
some users it'd not be intuitive that the SMTP provider must be
activated so Zitadel can use it to send notifications.

# How the Problems Are Solved

- When a new SMTP provider is added or updated, the wizard has a new
step that allow us to activate or deactivate the provider configured in
the previous step. The following video shows the new wizard:


https://github.com/zitadel/zitadel/assets/30386061/178234d6-73dc-4719-af0b-1d6f19bf3f7d

# Additional Context

- Closes #7929

internal/api/grpc/admin/iam_settings_converter.go

@@ -172,6 +172,7 @@ func SMTPConfigToPb(smtp *query.SMTPConfig) *settings_pb.SMTPConfig {
 		User:           smtp.User,
 		Details:        obj_grpc.ToViewDetailsPb(smtp.Sequence, smtp.CreationDate, smtp.ChangeDate, smtp.ResourceOwner),
 		Id:             smtp.ID,
+		State:          settings_pb.SMTPConfigState(smtp.State),
 	}
 	return mapped
 }