Fix exception import Az.Accounts caused by environment variables#18311

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isra-fel:18304-import-module-azaccounts-throws-an-exception-if-2-environment-vars-differ-only-by-caseisra-fel/azure-powershell:18304-import-module-azaccounts-throws-an-exception-if-2-environment-vars-differ-only-by-caseCopy head branch name to clipboard