[Mellanox] Handle exception during Inotify import

[vivekrnv]

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):
#012  File "/usr/local/bin/decode-syseeprom", line 35, in instantiate_eeprom_object#012    eeprom = sonic_platform.platform.Platform().get_chassis().get_eeprom()
#012             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/platform.py", line 35, in __init__
#012    self._chassis = SmartSwitchChassis()#012                    ^^^^^^^^^^^^^^^^^^^^
#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/chassis.py", line 1207, in __init__
#012    self.initialize_modules()#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/chassis.py", line 1244, in initialize_modules
#012    self.initialize_single_module(index=index)
#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/chassis.py", line 1235, in initialize_single_module
#012    from .module import DpuModule#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/module.py", line 24, in <module>
#012    from .dpuctlplat import DpuCtlPlat, BootProgEnum
#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/dpuctlplat.py", line 29, in <module>
#012    from .inotify_helper import InotifyHelper
#012  File "/usr/local/lib/python3.11/dist-packages/sonic_platform/inotify_helper.py", line 21, in <module>
#012    import inotify.adapters#012  File "/usr/local/lib/python3.11/dist-packages/inotify/adapters.py", line 37, in <module>
#012    _IS_DEBUG = bool(int(os.environ.get('DEBUG', '0')))
#012                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
#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

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211
• 202305

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[mssonicbld]

/azp run Azure.sonic-buildimage

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

Cherry-pick PR to 202411: #21650