MDEV-26181: The test compat/oracle.sp-row fails in case it is run in PS mode.

There were several places where a statement delimiter missed so
such statements were interpreted as multi-statements and expectedly failed
in PS mode. An appropriate statement delimiters have been added
to fix the issues. Addinitinally, the operators
 --enable_prepare_warnings/--disable_prepare_warnings have been added
around statements that use depricated syntax SELECT INTO to don't
miss warnings.

mysql-test/suite/compat/oracle/r/sp-row.result

@@ -252,6 +252,7 @@ AS
 BEGIN
 RETURN a;
 END;
+$$
 CREATE PROCEDURE p1()
 AS
 a ROW (a INT,b INT);
@@ -268,6 +269,7 @@ AS
 BEGIN
 RETURN a;
 END;
+$$
 CREATE PROCEDURE p1()
 AS
 a ROW (a INT);

mysql-test/suite/compat/oracle/t/sp-row.test

-if (`SELECT $PS_PROTOCOL != 0`)
-{
-   --skip Test temporarily disabled for ps-protocol
-}
 
 SET sql_mode=ORACLE;
 
@@ -329,6 +325,7 @@ AS
 BEGIN
   RETURN a;
 END;
+$$
 CREATE PROCEDURE p1()
 AS
   a ROW (a INT,b INT);
@@ -349,6 +346,7 @@ AS
 BEGIN
   RETURN a;
 END;
+$$
 CREATE PROCEDURE p1()
 AS
   a ROW (a INT);
@@ -866,6 +864,8 @@ DROP PROCEDURE p2;
 --echo # ROW fields as SELECT..INTO targets
 --echo #
 
+--enable_prepare_warnings
+
 DELIMITER $$;
 CREATE PROCEDURE p1
 AS
@@ -879,6 +879,7 @@ DELIMITER ;$$
 CALL p1;
 DROP PROCEDURE p1;
 
+--disable_prepare_warnings
 
 --echo #
 --echo # Implicit default NULL handling
@@ -2088,6 +2089,7 @@ DROP PROCEDURE p1;
 --echo #
 
 
+--enable_prepare_warnings
 --echo # ROW variable with a wrong column count
 CREATE TABLE t1 (a INT, b VARCHAR(32));
 INSERT INTO t1 VALUES (10,'b10');
@@ -2248,7 +2250,7 @@ DELIMITER ;$$
 CALL p1();
 DROP TABLE t1;
 DROP PROCEDURE p1;
-
+--disable_prepare_warnings
 
 --echo #
 --echo # MDEV-12347 Valgrind reports invalid read errors in Item_field_row::element_index_by_name