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/cloudwatch/utils/utils.go

@@ -4,15 +4,6 @@ import "github.com/go-stack/stack"
 
 func Pointer[T any](arg T) *T { return &arg }
 
-func Depointerizer[T any](v *T) T {
-	var emptyValue T
-	if v != nil {
-		emptyValue = *v
-	}
-
-	return emptyValue
-}
-
 // Stack is copied from grafana/pkg/infra/log
 // TODO: maybe this should live in grafana-plugin-sdk-go?
 func Stack(skip int) string {