Add multi-asic namespace support for crm show resources command

[william8545]

What I did

Added the --namespace (-n) option to the crm show resources command. This allows users to query CRM resource usage and availability for a specific ASIC in a multi-ASIC environment.

How I did it

• Added the @multi_asic_util.multi_asic_click_option_namespace decorator to the resources command group in crm/main.py.
• Assigned the parsed namespace argument to the CRM context (ctx.obj["crm"].multi_asic.namespace_option).
• Since the underlying data fetching methods (like show_resources) already utilize the @multi_asic_util.run_on_multi_asic decorator, simply setting the namespace_option allows the existing multi-ASIC framework to seamlessly handle database connections for the targeted ASIC.
• Added unit tests in tests/crm_test.py to ensure the -n option works correctly.

How to verify it

Verify by running the crm show resources command with the -n option on a multi-ASIC device, and observing that only the specified ASIC's information is returned:

• crm show resources -n asic0 all
• crm show resources -n asic0 fdb
• crm show resources -n asic0 ipv4 route
• crm show resources -n asic0 acl group

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

[mssonicbld]

/azp run

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[william8545]

/azpw run

[mssonicbld]

/AzurePipelines run

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