Auth: Refactor for revoking user tokens within last hours (#74616)

* fix: revoked tokens within last hours

adds check for unlimited sessions out of index
adds a function for specifing the hours to look back when revoking users tokens, otherwise we "assume" the clean up takes care of them adds a index for the `user_auth_token` - `revoked_at` for faster queries when using `revoked_at`

* fix: sqllite datetime conversion with unixtimestamps

* fix: postgres dialect

* fix: mysql dialect

* fix: mysql dialect missing closing )

* refactor: delete revoked tokens directly

* fix: tests for sqlite

* AuthToken: Simplify DeleteUserRevokedTokens and add test

* fix: linting newline

* Reset get time after test

* fix: test order by revoked

* fix: order by different db

* ascending

* test with seen at

---------

Co-authored-by: Karl Persson <kalle.persson@grafana.com>

pkg/services/sqlstore/migrations/user_auth_token_mig.go

@@ -44,4 +44,8 @@ func addUserAuthTokenMigrations(mg *Migrator) {
 			},
 		),
 	)
+
+	mg.AddMigration("add index user_auth_token.revoked_at", NewAddIndexMigration(userAuthTokenV1, &Index{
+		Cols: []string{"revoked_at"},
+	}))
 }