[provisioning] Make provisioning manifest visible

Make the perso mannifest publicly visible so downstream build rules can
refer to it.

Signed-off-by: Chris Frantz <cfrantz@google.com>

Author: cfrantz

sw/device/silicon_creator/manuf/base/BUILD

@@ -328,7 +328,6 @@ manifest(d = {
     "name": "manifest_perso",
     "identifier": hex(CONST.ROM_EXT),
     "manuf_state_creator": hex(CONST.MANUF_STATE.PERSO_INITIAL),
-    "visibility": ["//visibility:private"],
     "version_major": "0",
     # Release: 2026-03-18-RC00
     "version_minor": "2026031800",