Codegen: Generate Golang code using cog (#98812)

* Use cog for Go types

* Delete old generation code

* Fix plugins generation

* workspaces update

* Update datasources with new generated code

* More fixes

* Update swagger and openapi specs

* Fixes

* More files...

* Update workspace

* More fixes...

* Remove unused functions

pkg/tsdb/loki/parse_query.go

@@ -154,7 +154,7 @@ func parseQuery(queryContext *backend.QueryDataRequest, logqlScopesEnabled bool)
 			return nil, err
 		}
 
-		expr := interpolateVariables(depointerizer(model.Expr), interval, timeRange, queryType, step)
+		expr := interpolateVariables(model.Expr, interval, timeRange, queryType, step)
 
 		direction, err := parseDirection(model.Direction)
 		if err != nil {
@@ -197,12 +197,3 @@ func parseQuery(queryContext *backend.QueryDataRequest, logqlScopesEnabled bool)
 
 	return qs, nil
 }
-
-func depointerizer[T any](v *T) T {
-	var emptyValue T
-	if v != nil {
-		emptyValue = *v
-	}
-
-	return emptyValue
-}