Secrets: Implement basic unified secret store service (#45804)

* wip: Implement kvstore for secrets

* wip: Refactor kvstore for secrets

* wip: Add format key function to secrets kvstore sql

* wip: Add migration for secrets kvstore

* Remove unused Key field from secrets kvstore

* Remove secret values from debug logs

* Integrate unified secrets with datasources

* Fix minor issues and tests for kvstore

* Create test service helper for secret store

* Remove encryption tests from datasources

* Move secret operations after datasources

* Fix datasource proxy tests

* Fix legacy data tests

* Add Name to all delete data source commands

* Implement decryption cache on sql secret store

* Fix minor issue with cache and tests

* Use secret type on secret store datasource operations

* Add comments to make create and update clear

* Rename itemFound variable to isFound

* Improve secret deletion and cache management

* Add base64 encoding to sql secret store

* Move secret retrieval to decrypted values function

* Refactor decrypt secure json data functions

* Fix expr tests

* Fix datasource tests

* Fix plugin proxy tests

* Fix query tests

* Fix metrics api tests

* Remove unused fake secrets service from query tests

* Add rename function to secret store

* Add check for error renaming secret

* Remove bus from tests to fix merge conflicts

* Add background secrets migration to datasources

* Get datasource secure json fields from secrets

* Move migration to secret store

* Revert "Move migration to secret store"

This reverts commit 7c3f872072.

* Add secret service to datasource service on tests

* Fix datasource tests

* Remove merge conflict on wire

* Add ctx to data source http transport on prometheus stats collector

* Add ctx to data source http transport on stats collector test

pkg/server/wire.go

@@ -79,6 +79,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/searchV2"
 	"github.com/grafana/grafana/pkg/services/secrets"
 	secretsDatabase "github.com/grafana/grafana/pkg/services/secrets/database"
+	secretsStore "github.com/grafana/grafana/pkg/services/secrets/kvstore"
 	secretsManager "github.com/grafana/grafana/pkg/services/secrets/manager"
 	"github.com/grafana/grafana/pkg/services/serviceaccounts"
 	serviceaccountsmanager "github.com/grafana/grafana/pkg/services/serviceaccounts/manager"
@@ -239,6 +240,7 @@ var wireBasicSet = wire.NewSet(
 	wire.Bind(new(alerting.DashAlertExtractor), new(*alerting.DashAlertExtractorService)),
 	comments.ProvideService,
 	guardian.ProvideService,
+	secretsStore.ProvideService,
 	avatar.ProvideAvatarCacheServer,
 	authproxy.ProvideAuthProxy,
 	statscollector.ProvideService,