Enable ssh connectivity for dev sku

[anvrao1]

---

This PR enables SSH connectivity for the Developer SKU by replacing the direct SKU and tunneling check with a unified helper function.

Introduce _is_nativeclient_enabled to allow Developer SKU by default and preserve existing checks for Standard/Premium.
Replace the original SKU-plus-tunneling conditional with a call to the new helper.
Retain the error-raising logic, now backed by the helper function.

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[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.

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Pull Request Overview

This PR updates the extension version, adds a release note, and refactors SSH bastion logic to support Developer SKU native client connectivity.

• Bump extension version to 1.4.1 and add HISTORY entry
• Introduce _is_nativeclient_enabled helper and replace SKU/tunneling check
• Update error path to use new helper

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/bastion/setup.py	Updated VERSION to 1.4.1
src/bastion/azext_bastion/custom.py	Added _is_nativeclient_enabled, refactored SKU/tunneling check
src/bastion/HISTORY.rst	Added 1.4.1 release notes

Comments suppressed due to low confidence (3)

src/bastion/azext_bastion/custom.py:184

• The error message is now misleading because Developer SKU is allowed. Update it to reflect that Developer, Standard, or Premium SKUs are supported when native client (tunneling) is enabled.

raise ClientRequestError('Bastion Host SKU must be Standard or Premium and Native Client must be enabled.')

src/bastion/azext_bastion/custom.py:391

• Add a docstring for _is_nativeclient_enabled to explain when it returns true (e.g., Developer SKU always, Standard/Premium with tunneling).

def _is_nativeclient_enabled(bastion):

src/bastion/azext_bastion/custom.py:183

• Consider adding unit tests for _is_nativeclient_enabled and for the SSH flow with Developer SKU to ensure correct connectivity behavior.

if not _is_nativeclient_enabled(bastion):

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[necusjz]

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[anvrao1]

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[aavalang]

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[yonzhan]

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[Release] Update index.json for extension [ bastion-1.4.1 ] : https://dev.azure.com/msazure/One/_build/results?buildId=127151782&view=results