blueprint: UserWarning: pkg_resources is deprecated as an API

### Describe the bug

The following error raised when I use `az blueprint` like `az blueprint list` and `az blueprint artifact delete` .

```
root@proxy01:~# az blueprint list
/root/.azure/cliextensions/blueprint/azext_blueprint/vendored_sdks/__init__.py:6: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
__import__('pkg_resources').declare_namespace(__name__)
This command group has been deprecated and will be removed in next breaking change release(2.79.0) scheduled for Nov 2025.
```

### Related command

I can find that the following command raised the same error.

- az blueprint artifact delete
- az blueprint list
- az blueprint artifact list

### Errors

```
root@proxy01:~# az blueprint list
/root/.azure/cliextensions/blueprint/azext_blueprint/vendored_sdks/__init__.py:6: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
__import__('pkg_resources').declare_namespace(__name__)
This command group has been deprecated and will be removed in next breaking change release(2.79.0) scheduled for Nov 2025.
```

### Issue script & Debug output

```
root@proxy01:~# az blueprint list --debug
cli.knack.cli: Command arguments: ['blueprint', 'list', '--debug']
cli.knack.cli: __init__ debug log:
Enable color in terminal.
cli.knack.cli: Event: Cli.PreExecute []
cli.knack.cli: Event: CommandParser.OnGlobalArgumentsCreate [, , ]
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableCreate []
cli.azure.cli.core: Modules found from index for 'blueprint': ['azext_blueprint']
cli.azure.cli.core: Loading command modules:
cli.azure.cli.core: Name Load Time Groups Commands
cli.azure.cli.core: Total (0) 0.000 0 0
cli.azure.cli.core: These extensions are not installed and will be skipped: ['azext_ai_examples', 'azext_next']
cli.azure.cli.core: Loading extensions:
cli.azure.cli.core: Name Load Time Groups Commands Directory
cli.azure.cli.core: blueprint 0.103 9 34 /root/.azure/cliextensions/blueprint
cli.azure.cli.core: Total (1) 0.103 9 34
cli.azure.cli.core: Loaded 9 groups, 34 commands.
cli.azure.cli.core: Found a match in the command table.
cli.azure.cli.core: Raw command : blueprint list
cli.azure.cli.core: Command table: blueprint list
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableTruncate []
cli.azure.cli.core.azlogging: metadata file logging enabled - writing logs to '/root/.azure/commands/2025-09-30.07-01-06.blueprint_list.40463.log'.
az_command_data_logger: command args: blueprint list --debug
cli.knack.cli: Event: CommandInvoker.OnPreArgumentLoad [.add_subscription_parameter at 0x7f9026667560>]
/root/.azure/cliextensions/blueprint/azext_blueprint/vendored_sdks/__init__.py:6: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
__import__('pkg_resources').declare_namespace(__name__)
cli.knack.cli: Event: CommandInvoker.OnPostArgumentLoad []
cli.knack.cli: Event: CommandInvoker.OnPostCommandTableCreate [.add_ids_arguments at 0x7f90266918a0>, .add_cache_arguments at 0x7f9026691a80>, .update_breaking_change_info at 0x7f9026691b20>]
cli.knack.cli: Event: CommandInvoker.OnCommandTableLoaded []
cli.knack.cli: Event: CommandInvoker.OnPreParseArgs []
cli.knack.cli: Event: CommandInvoker.OnPostParseArgs [, , .parse_ids_arguments at 0x7f9026691940>]
az_command_data_logger: extension name: blueprint
az_command_data_logger: extension version: 1.0.0b1
This command group has been deprecated and will be removed in next breaking change release(2.79.0) scheduled for Nov 2025.
Blueprints and associated commands will be deprecated
as early as July 2026. Customers are encouraged to transition to
Template Specs and Deployments Stacks to support their scenarios beyond that date.
Migration documentation is available at
https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/migrate-blueprint.
This command is in preview and under development. Reference and support levels: https://aka.ms/CLI_refstatus
cli.azure.cli.core.azclierror: Traceback (most recent call last):
File "/opt/az/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
cmd_result = self.invocation.execute(args)
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 666, in execute
raise ex
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 734, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 716, in _run_job
result = list(result)
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/aaz/_paging.py", line 87, in __next__
return next(self._page_iterator)
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/aaz/_paging.py", line 43, in __next__
self._executor(self._next_link)
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/aaz/_command.py", line 250, in executor_wrapper
executor()
~~~~~~~~^^
File "/root/.azure/cliextensions/blueprint/azext_blueprint/aaz/latest/blueprint/_list.py", line 60, in _execute_operations
self.pre_operations()
~~~~~~~~~~~~~~~~~~~^^
File "/root/.azure/cliextensions/blueprint/azext_blueprint/custom.py", line 218, in pre_operations
_blueprint_validator(self)
~~~~~~~~~~~~~~~~~~~~^^^^^^
File "/root/.azure/cliextensions/blueprint/azext_blueprint/custom.py", line 103, in _blueprint_validator
args.resource_scope = '/subscriptions/{}'.format(get_subscription_id(cmd.cli_ctx))
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/commands/client_factory.py", line 294, in get_subscription_id
cli_ctx.data['subscription_id'] = Profile(cli_ctx=cli_ctx).get_subscription_id()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/_profile.py", line 575, in get_subscription_id
return self.get_subscription(subscription)[_SUBSCRIPTION_ID]
~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
File "/opt/az/lib/python3.13/site-packages/azure/cli/core/_profile.py", line 558, in get_subscription
raise CLIError(_AZ_LOGIN_MESSAGE)
knack.util.CLIError: Please run 'az login' to setup account.

cli.azure.cli.core.azclierror: Please run 'az login' to setup account.
az_command_data_logger: Please run 'az login' to setup account.
cli.knack.cli: Event: Cli.PostExecute []
az_command_data_logger: exit code: 1
cli.__main__: Command ran in 0.282 seconds (init: 0.094, invoke: 0.188)
telemetry.main: Begin splitting cli events and extra events, total events: 1
telemetry.client: Accumulated 0 events. Flush the clients.
telemetry.main: Finish splitting cli events and extra events, cli events: 1
telemetry.save: Save telemetry record of length 3792 in cache file under /root/.azure/telemetry/20250930070106708
telemetry.main: Begin creating telemetry upload process.
telemetry.process: Creating upload process: "/opt/az/bin/python3 /opt/az/lib/python3.13/site-packages/azure/cli/telemetry/__init__.py /root/.azure /root/.azure/telemetry/20250930070106708"
telemetry.process: Return from creating process 40469
telemetry.main: Finish creating telemetry upload process.
root@proxy01:~#
```

### Expected behavior

No warning should be raised. Customers will be confused by this message. Customer may misunderstand that they can't use `az blueprint` after Nov 2025, not July 2026.

### Environment Summary

```
root@proxy01:~# az --version
azure-cli 2.77.0

core 2.77.0
telemetry 1.1.0

Extensions:
azure-firewall 1.3.0
bastion 1.4.2
blueprint 1.0.0b1

Dependencies:
msal 1.34.0b1
azure-mgmt-resource 23.3.0

Python location '/opt/az/bin/python3'
Config directory '/root/.azure'
Extensions directory '/root/.azure/cliextensions'

Python (Linux) 3.13.7 (main, Aug 26 2025, 08:46:54) [GCC 11.4.0]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.
```

### Additional context

_No response_