Intel IPU7: Update product signed firmware binary

Update IPU7 firmware binary, it is a product signed binary
used in latest Intel Pather Lake SOCs. Its version is same
as the old one, but it's product signed binary which can
be used in released product.

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>

WHENCE

@@ -1398,7 +1398,7 @@ File: intel/ipu/ipu7_fw.bin
 Version: master_release_20240628_1854
 
 File: intel/ipu/ipu7ptl_fw.bin
-Version: master_release_20250515_1232
+Version: master_release_20250515_1232_ProductSigned
 
 Licence: Redistributable. See LICENSE.intel for details