Add user id to default context name to avoid context clashing

[cormacpayne]

Description

Fix for #6489

Change default name for context to be in the format subscriptionName (subscriptionId) - accountId to prevent context clashes when authenticating with different user accounts.

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
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• The appropriate change log has been updated
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
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