Define required_submodules in environment_no_cipd.json (project-chip#…

…18032)

Currently no required_submodules are defined, which makes
scripts/no_cipd_bootstrap.sh complain with:

Not all submodules are initialized. Please run the following commands.

    git submodule update --init third_party/mbed-mcu-boot/repo/boot/espressif/hal/esp-idf
...

scripts/environment_no_cipd.json

@@ -3,5 +3,6 @@
         "gn_root": ".",
         "gn_targets": [":python_packages.install"]
     },
+    "required_submodules": ["third_party/pigweed/repo"],
     "gni_file": "build_overrides/pigweed_environment.gni"
 }