[Mellanox] Handle exception during Inotify import

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#### Why I did it

During smartswitch initialization, an error is observed during switch bootup. ztp disable runs decode-eeprom.
```
sonic ERR decode-syseeprom: Failed to obtain EEPROM object due to ValueError("invalid literal for int() with base 10: ''"),
Traceback: Traceback (most recent call last):
#12  File "/usr/local/bin/decode-syseeprom", line 35, in instantiate_eeprom_object#012    eeprom = sonic_platform.platform.Platform().get_chassis().get_eeprom()
#12             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
#12  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/platform.py", line 35, in __init__
#12    self._chassis = SmartSwitchChassis()#12                    ^^^^^^^^^^^^^^^^^^^^
#12  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/chassis.py", line 1207, in __init__
#12    self.initialize_modules()#12  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/chassis.py", line 1244, in initialize_modules
#12    self.initialize_single_module(index=index)
#12  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/chassis.py", line 1235, in initialize_single_module
#12    from .module import DpuModule#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/module.py", line 24, in <module>
#12    from .dpuctlplat import DpuCtlPlat, BootProgEnum
#12  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/dpuctlplat.py", line 29, in <module>
#12    from .inotify_helper import InotifyHelper
#12  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/inotify_helper.py", line 21, in <module>
#12    import inotify.adapters#012  File "/usr/local/lib/python3.11/dist-packages/inotify/adapters.py", line 37, in <module>
#12    _IS_DEBUG = bool(int(os.environ.get('DEBUG', '0')))
#12                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
#012ValueError: invalid literal for int() with base 10: ''
```
Happens during ztp because, ztp sets DEBUG="" here https://github.com/sonic-net/sonic-ztp/blob/202411/src/etc/default/ztp#L6

#### How I did it

Fixed the import in inotify

#### How to verify it

Verified by running decode-eeprom during init

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platform/mellanox/mlnx-platform-api/sonic_platform/inotify_helper.py

@@ -1,5 +1,6 @@
 #
-# Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
+# SPDX-FileCopyrightText: NVIDIA CORPORATION & AFFILIATES
+# Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # Apache-2.0
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -18,6 +19,9 @@
 """Helper code for Inotify Implementation for reading file until timeout"""
 import os
 import errno
+# Inotify causes an exception when DEBUG env variable is set to a non-integer convertible
+# https://github.com/dsoprea/PyInotify/blob/0.2.10/inotify/adapters.py#L37
+os.environ['DEBUG'] = '0'
 import inotify.adapters
 
 try: