[SSH] Change the scope of AT request to MSAL to AADSSHLoginForLinux app id

[vthiebaut10]

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[yonzhan]

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[azure-client-tools-bot-prd]

Hi @vthiebaut10,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
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[github-actions]

Hi @vthiebaut10

Release Suggestions

Module: ssh

• Please log updates into to src/ssh/HISTORY.rst
• Update VERSION to 2.1.0 in src/ssh/setup.py

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[Copilot]

Pull request overview

This PR changes the authentication scope for SSH certificate acquisition from cloud-specific endpoints to a unified AADSSHLoginForLinux application ID. This simplifies the authentication flow by using a single app ID across all Azure cloud environments.

• Removes the cloud-to-scope mapping dictionary that previously supported Azure Cloud, Azure China Cloud, and Azure US Government
• Replaces cloud-specific scopes with the hardcoded AADSSHLoginForLinux app ID 'ce6ff14a-7fdc-4685-bbe0-f6afdfcfa8e0'
• Adds debug logging for the scopes list

[Copilot]

Trailing whitespace detected at the end of this line. Remove the whitespace after the closing parenthesis.

Suggested change

	logger.debug(scopes)
	logger.debug(scopes)

[Copilot]

The intermediate 'scope' variable on line 208 is only used once on line 210. Consider directly initializing 'scopes' as a list literal instead of creating an intermediate variable. This would simplify the code by reducing it to a single line: scopes = ['ce6ff14a-7fdc-4685-bbe0-f6afdfcfa8e0']

Suggested change

	scope = 'ce6ff14a-7fdc-4685-bbe0-f6afdfcfa8e0'
	scopes = [scope]
	scopes = ['ce6ff14a-7fdc-4685-bbe0-f6afdfcfa8e0']