Remove GetByBean method because sometimes it's danger when query condition parameter is zero and also introduce new generic methods (#28220)

The function `GetByBean` has an obvious defect that when the fields are
empty values, it will be ignored. Then users will get a wrong result
which is possibly used to make a security problem.

To avoid the possibility, this PR removed function `GetByBean` and all
references.
And some new generic functions have been introduced to be used.

The recommand usage like below.

```go
// if query an object according id
obj, err := db.GetByID[Object](ctx, id)
// query with other conditions
obj, err := db.Get[Object](ctx, builder.Eq{"a": a, "b":b})
```

models/webhook/hooktask.go

@@ -16,6 +16,7 @@ import (
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 
 	gouuid "github.com/google/uuid"
+	"xorm.io/builder"
 )
 
 //   ___ ___                __   ___________              __
@@ -150,14 +151,10 @@ func UpdateHookTask(ctx context.Context, t *HookTask) error {
 
 // ReplayHookTask copies a hook task to get re-delivered
 func ReplayHookTask(ctx context.Context, hookID int64, uuid string) (*HookTask, error) {
-	task := &HookTask{
-		HookID: hookID,
-		UUID:   uuid,
-	}
-	has, err := db.GetByBean(ctx, task)
+	task, exist, err := db.Get[HookTask](ctx, builder.Eq{"hook_id": hookID, "uuid": uuid})
 	if err != nil {
 		return nil, err
-	} else if !has {
+	} else if !exist {
 		return nil, ErrHookTaskNotExist{
 			HookID: hookID,
 			UUID:   uuid,