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);