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/db/error.go

@@ -72,3 +72,21 @@ func (err ErrNotExist) Error() string {
 func (err ErrNotExist) Unwrap() error {
 	return util.ErrNotExist
 }
+
+// ErrConditionRequired represents an error which require condition.
+type ErrConditionRequired struct{}
+
+// IsErrConditionRequired checks if an error is an ErrConditionRequired
+func IsErrConditionRequired(err error) bool {
+	_, ok := err.(ErrConditionRequired)
+	return ok
+}
+
+func (err ErrConditionRequired) Error() string {
+	return "condition is required"
+}
+
+// Unwrap unwraps this as a ErrNotExist err
+func (err ErrConditionRequired) Unwrap() error {
+	return util.ErrInvalidArgument
+}