Don't export php_pdo_int.h

This is, as the name and a comment in the header imply, an internal
header which is not supposed to be used by extensions other than PDO
(not even by drivers).

Since there is apparently no need to include this header in the parsers
of the drivers, we remove these includes, and no longer declare the
header to be installed.  Given that the header is only exported for a
couple of weeks[1], this is not considered to be a BC break, because
it's unlikely that external drivers have already been adjusted to use
this header, and otherwise they can still be fixed; PHP 8.4 is still in
the pre-release stage.

[1] <https://github.com/php/php-src/pull/14797>

Closes GH-15688.

NEWS

@@ -20,6 +20,10 @@ PHP                                                                        NEWS
 - GD:
   . Added gdImageClone to bundled libgd. (David Carlier)
 
+- PDO:
+  . The internal header php_pdo_int.h is no longer installed; it is not
+    supposed to be used by PDO drivers. (cmb)
+
 - PDO_Firebird:
   . Fixed GH-15604 (Always make input parameters nullable). (sim1984)
 

ext/pdo/config.m4

@@ -16,7 +16,6 @@ if test "$PHP_PDO" != "no"; then
     pdo_sql_parser.h
     php_pdo_driver.h
     php_pdo_error.h
-    php_pdo_int.h
     php_pdo.h
   ]))
   PHP_ADD_MAKEFILE_FRAGMENT

ext/pdo/config.w32

@@ -10,7 +10,6 @@ if (PHP_PDO != "no") {
 		"pdo_sql_parser.h " +
 		"php_pdo_driver.h " +
 		"php_pdo_error.h " +
-		"php_pdo_int.h " +
 		"php_pdo.h"
 	);
 }

ext/pdo/pdo_sql_parser.re

@@ -16,7 +16,6 @@
 
 #include "php.h"
 #include "php_pdo_driver.h"
-#include "php_pdo_int.h"
 #include "pdo_sql_parser.h"
 
 static int default_scanner(pdo_scanner_t *s)

ext/pdo_mysql/mysql_sql_parser.re

@@ -17,7 +17,6 @@
 
 #include "php.h"
 #include "ext/pdo/php_pdo_driver.h"
-#include "ext/pdo/php_pdo_int.h"
 #include "ext/pdo/pdo_sql_parser.h"
 
 int pdo_mysql_scanner(pdo_scanner_t *s)

ext/pdo_pgsql/pgsql_sql_parser.re

@@ -17,7 +17,6 @@
 
 #include "php.h"
 #include "ext/pdo/php_pdo_driver.h"
-#include "ext/pdo/php_pdo_int.h"
 #include "ext/pdo/pdo_sql_parser.h"
 
 int pdo_pgsql_scanner(pdo_scanner_t *s)

ext/pdo_sqlite/sqlite_sql_parser.re

@@ -17,7 +17,6 @@
 
 #include "php.h"
 #include "ext/pdo/php_pdo_driver.h"
-#include "ext/pdo/php_pdo_int.h"
 #include "ext/pdo/pdo_sql_parser.h"
 
 int pdo_sqlite_scanner(pdo_scanner_t *s)