Add Azure CLI v2.69.0+ compatibility for user-assigned managed identity authentication

[Copilot]

Azure CLI v2.69.0 replaced --username with --client-id for user-assigned managed identity authentication (azure-cli#30525). This implements version detection to maintain backward compatibility.

Changes

• Version detection: Parse Azure CLI version during login initialization and store in azVersion property
• Conditional parameter selection: Use --username for CLI < 2.69.0, --client-id for >= 2.69.0 in loginWithUserAssignedIdentity()
• Error handling: Graceful fallback to legacy behavior if version parsing fails

Implementation

async loginWithUserAssignedIdentity(args: string[]) {
    let azcliMinorVersion = 0;
    try {
        azcliMinorVersion = parseInt(this.azVersion.split('.')[1], 10);
    }
    catch (error) {
        core.warning("Failed to parse the minor version of Azure CLI. Assuming the version is less than 2.69.0");
    }
    
    if (azcliMinorVersion < 69) {
        args.push("--username", this.loginConfig.servicePrincipalId);
    }
    else {
        args.push("--client-id", this.loginConfig.servicePrincipalId);
    }
    await this.callCliLogin(args, 'user-assigned managed identity');
}

Original prompt

Reference: bbcc074

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