Split tests/ibase_free_query_001.phpt into 2 tests

This patch splits `tests/ibase_free_query_001.phpt` into 2 tests so that
we can check for different error messages depending on which PHP version
we are running.

Author: Jon4t4n

tests/ibase_free_query_001.phpt

@@ -1,7 +1,10 @@
 --TEST--
 ibase_free_query(): Basic test
 --SKIPIF--
-<?php include("skipif.inc"); ?>
+<?php
+include("skipif.inc");
+include("skipif-php8-or-newer.inc");
+?>
 --FILE--
 <?php
 

tests/ibase_free_query_002.phpt

@@ -0,0 +1,27 @@
+--TEST--
+ibase_free_query(): Basic test
+--SKIPIF--
+<?php
+include("skipif.inc");
+include("skipif-php7-or-older.inc");
+?>
+--FILE--
+<?php
+
+require("interbase.inc");
+
+$x = ibase_connect($test_base);
+
+$q =ibase_prepare($x, 'SELECT 1 FROM test1 WHERE i = ?');
+$q =ibase_prepare($x, 'SELECT 1 FROM test1 WHERE i = ?');
+$q = ibase_prepare($x, 'SELECT 1 FROM test1 WHERE i = ?');
+
+var_dump(ibase_free_query($q));
+var_dump(ibase_free_query($q));
+var_dump(ibase_free_query($x));
+
+?>
+--EXPECTF--
+bool(true)
+
+Fatal error: Uncaught TypeError: ibase_free_query(): supplied resource is not a valid Firebird/InterBase query resource in %a