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/auth/source.go

@@ -265,10 +265,10 @@ func IsSSPIEnabled(ctx context.Context) bool {
 		return false
 	}
 
-	exist, err := db.Exists[Source](ctx, FindSourcesOptions{
+	exist, err := db.Exist[Source](ctx, FindSourcesOptions{
 		IsActive:  util.OptionalBoolTrue,
 		LoginType: SSPI,
-	})
+	}.ToConds())
 	if err != nil {
 		log.Error("Active SSPI Sources: %v", err)
 		return false