Update config.m4 to reference src/client_constructor_mock.c

- Fix remaining reference to tests/client_constructor_mock.c in config.m4
- Ensures PIE build uses correct file location
- Complete the move from tests/ to src/ directory

Signed-off-by: James Duong <[email protected]>

Author: jduo

config.m4

@@ -52,7 +52,7 @@ if test "$PHP_VALKEY_GLIDE" != "no"; then
     LDFLAGS="$LDFLAGS $PHP_VALKEY_GLIDE_LDFLAGS"
   fi
   PHP_NEW_EXTENSION(valkey_glide,
-    valkey_glide.c valkey_glide_cluster.c cluster_scan_cursor.c command_response.c logger.c valkey_glide_commands.c valkey_glide_commands_2.c valkey_glide_commands_3.c valkey_glide_core_commands.c valkey_glide_core_common.c valkey_glide_expire_commands.c valkey_glide_geo_commands.c valkey_glide_geo_common.c valkey_glide_hash_common.c valkey_glide_list_common.c valkey_glide_s_common.c valkey_glide_str_commands.c valkey_glide_x_commands.c valkey_glide_x_common.c valkey_glide_z.c valkey_glide_z_common.c valkey_z_php_methods.c src/command_request.pb-c.c src/connection_request.pb-c.c src/response.pb-c.c tests/client_constructor_mock.c,
+    valkey_glide.c valkey_glide_cluster.c cluster_scan_cursor.c command_response.c logger.c valkey_glide_commands.c valkey_glide_commands_2.c valkey_glide_commands_3.c valkey_glide_core_commands.c valkey_glide_core_common.c valkey_glide_expire_commands.c valkey_glide_geo_commands.c valkey_glide_geo_common.c valkey_glide_hash_common.c valkey_glide_list_common.c valkey_glide_s_common.c valkey_glide_str_commands.c valkey_glide_x_commands.c valkey_glide_x_common.c valkey_glide_z.c valkey_glide_z_common.c valkey_z_php_methods.c src/command_request.pb-c.c src/connection_request.pb-c.c src/response.pb-c.c src/client_constructor_mock.c,
     $ext_shared)
 
   EXTRA_DIST="$EXTRA_DIST valkey_glide.stub.php valkey_glide_cluster.stub.php logger.stub.php"