IAM: Create Service Account API and legacy store impl (#110411)

* wip

* IAM: Create Service Account

* Add dual writer

* Update openapi_test.go

* Add integration tests

* Add sql tests

* Add Role to SA spec, add validation, add DBTime, add tests

* Format, update test

* Fixes

* Add check for External

* Address feedback

* Update tests

* Address feedback

* make gen-go

* Simplify a bit

* Fixes

* make update-workspace

* Update pkg/registry/apis/iam/serviceaccount/store.go

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

* Address feedback, add test for generateName

---------

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

pkg/extensions/enterprise_imports.go

@@ -53,6 +53,5 @@ import (
 	_ "github.com/grafana/e2e"
 	_ "github.com/grafana/gofpdf"
 	_ "github.com/grafana/gomemcache/memcache"
-	_ "github.com/grafana/grafana/apps/alerting/alertenrichment/pkg/apis/alertenrichment/v1beta1"
 	_ "github.com/grafana/tempo/pkg/traceql"
 )