ServiceAccounts: API keys migration (#50002)

* ServiceAccounts: able to get upgrade status

* Banner with API keys migration info

* Show API keys migration info on Service accounts page

* Migrate individual API keys

* Use transaction for key migration

* Migrate all api keys to service accounts

* Hide api keys after migration

* Migrate API keys separately for each org

* Revert API key

* Revert key API method

* Rename migration actions and reducers

* Fix linter errors

* Tests for migrating single API key

* Tests for migrating all api keys

* More tests

* Fix reverting tokens

* API: rename convert to migrate

* Add api route descriptions to methods

* rearrange methods in api.go

* Refactor: rename and move some methods

* Prevent assigning tokens to non-existing service accounts

* Refactor: ID TO Id

* Refactor: fix error message

* Delete service account if migration failed

* Fix linter errors

pkg/services/serviceaccounts/models.go

@@ -73,6 +73,10 @@ type ServiceAccountProfileDTO struct {
 
 type ServiceAccountFilter string // used for filtering
 
+type APIKeysMigrationStatus struct {
+	Migrated bool `json:"migrated"`
+}
+
 const (
 	FilterOnlyExpiredTokens ServiceAccountFilter = "expiredTokens"
 	FilterOnlyDisabled      ServiceAccountFilter = "disabled"