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/registry/apis/iam/legacy/create_service_account.sql

@@ -0,0 +1,7 @@
+INSERT INTO {{ .Ident .UserTable }}
+  (uid, version, login, email, name, org_id, is_admin, is_disabled, email_verified,
+   is_provisioned, is_service_account, salt, rands, created, updated, last_seen_at)
+VALUES
+  ({{ .Arg .Command.UID }}, 0, {{ .Arg .Command.Login }}, {{ .Arg .Command.Email }}, {{ .Arg .Command.Name }},
+   {{ .Arg .Command.OrgID }}, false, {{ .Arg .Command.IsDisabled }}, false,
+   false, true, '', '', {{ .Arg .Command.Created }}, {{ .Arg .Command.Updated }}, {{ .Arg .Command.LastSeenAt }})