MDEV-34276: Implements the function ST_IsValid

The GIS function ST_Simplify takes ad input a geometry and returns 1
if the argument is geometrically valid, 0 if the argument is not
geometrically valid.

Author: StefanoPetrilli <stefanop_1999@hotmail.it>
Co-authored-by: Ahmed Ibrahim <ahmed.ibr.hashim@gmail.com>
Co-authored-by: Jon Olav Hauglid <jon.hauglid@oracle.com>
Co-authored-by: Erlend Dahl <erlend.dahl@oracle.com>
Co-authored-by: Norvald H. Ryeng <norvald.ryeng@oracle.com>
Co-authored-by: Menelaos Karavelas <menelaos.karavelas@oracle.com>
Co-authored-by: David.Zhao <david.zhao@oracle.com>
Co-authored-by: Pavan <pavan.naik@oracle.com>

mysql-test/main/spatial_utility_function_isvalid.test

-
 # Copyright (c) 2014, Oracle and/or its affiliates
 # Copyright (c) 2024, MariaDB Corporation.
 #

sql/item_geofunc.cc

@@ -4279,6 +4279,36 @@ class Create_func_isempty : public Create_func_arg1
 };
 
 
+class Create_func_isvalid : public Create_func_arg1
+{
+public:
+  Item *create_1_arg(THD *thd, Item *arg1) override
+  {
+    return new (thd->mem_root) Item_func_isvalid(thd, arg1);
+  }
+
+  static Create_func_isvalid s_singleton;
+
+protected:
+  Create_func_isvalid() = default;
+  virtual ~Create_func_isvalid() = default;
+};
+
+class Create_func_isvalid : public Create_func_arg1
+{
+public:
+  Item *create_1_arg(THD *thd, Item *arg1) override
+  {
+    return new (thd->mem_root) Item_func_isvalid(thd, arg1);
+  }
+
+  static Create_func_isvalid s_singleton;
+
+protected:
+  Create_func_isvalid() = default;
+  virtual ~Create_func_isvalid() = default;
+};
+
 class Create_func_isvalid : public Create_func_arg1
 {
 public: