Encryption: Refactor securejsondata.SecureJsonData to stop relying on global functions (#38865)

* Encryption: Add support to encrypt/decrypt sjd

* Add datasources.Service as a proxy to datasources db operations

* Encrypt ds.SecureJsonData before calling SQLStore

* Move ds cache code into ds service

* Fix tlsmanager tests

* Fix pluginproxy tests

* Remove some securejsondata.GetEncryptedJsonData usages

* Add pluginsettings.Service as a proxy for plugin settings db operations

* Add AlertNotificationService as a proxy for alert notification db operations

* Remove some securejsondata.GetEncryptedJsonData usages

* Remove more securejsondata.GetEncryptedJsonData usages

* Fix lint errors

* Minor fixes

* Remove encryption global functions usages from ngalert

* Fix lint errors

* Minor fixes

* Minor fixes

* Remove securejsondata.DecryptedValue usage

* Refactor the refactor

* Remove securejsondata.DecryptedValue usage

* Move securejsondata to migrations package

* Move securejsondata to migrations package

* Minor fix

* Fix integration test

* Fix integration tests

* Undo undesired changes

* Fix tests

* Add context.Context into encryption methods

* Fix tests

* Fix tests

* Fix tests

* Trigger CI

* Fix test

* Add names to params of encryption service interface

* Remove bus from CacheServiceImpl

* Add logging

* Add keys to logger

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>

* Add missing key to logger

Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>

* Undo changes in markdown files

* Fix formatting

* Add context to secrets service

* Rename decryptSecureJsonData to decryptSecureJsonDataFn

* Name args in GetDecryptedValueFn

* Add template back to NewAlertmanagerNotifier

* Copy GetDecryptedValueFn to ngalert

* Add logging to pluginsettings

* Fix pluginsettings test

Co-authored-by: Tania B <yalyna.ts@gmail.com>
Co-authored-by: Emil Tullstedt <emil.tullstedt@grafana.com>

pkg/services/ngalert/api/api.go

@@ -9,6 +9,7 @@ import (
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/services/datasourceproxy"
 	"github.com/grafana/grafana/pkg/services/datasources"
+	"github.com/grafana/grafana/pkg/services/encryption"
 	apimodels "github.com/grafana/grafana/pkg/services/ngalert/api/tooling/definitions"
 	"github.com/grafana/grafana/pkg/services/ngalert/metrics"
 	"github.com/grafana/grafana/pkg/services/ngalert/notifier"
@@ -63,6 +64,7 @@ type API struct {
 	DataProxy            *datasourceproxy.DataSourceProxyService
 	MultiOrgAlertmanager *notifier.MultiOrgAlertmanager
 	StateManager         *state.Manager
+	EncryptionService    encryption.Service
 }
 
 // RegisterAPIEndpoints registers API handlers
@@ -76,7 +78,7 @@ func (api *API) RegisterAPIEndpoints(m *metrics.API) {
 	api.RegisterAlertmanagerApiEndpoints(NewForkedAM(
 		api.DatasourceCache,
 		NewLotexAM(proxy, logger),
-		AlertmanagerSrv{store: api.AlertingStore, mam: api.MultiOrgAlertmanager, log: logger},
+		AlertmanagerSrv{store: api.AlertingStore, mam: api.MultiOrgAlertmanager, enc: api.EncryptionService, log: logger},
 	), m)
 	// Register endpoints for proxying to Prometheus-compatible backends.
 	api.RegisterPrometheusApiEndpoints(NewForkedProm(