Temporarily remove required validation for VirtualMachineExtension to unblock vm list/get scenarios
Temporarily remove required validation for VirtualMachineExtension to unblock vm list/get scenarios

QingChenmsft/azure-cli,BurtBiel/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,QingChenmsft/azure-cli,samedder/azure-cli,BurtBiel/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,samedder/azure-cli,yugangw-msft/azure-cli,samedder/azure-cli,QingChenmsft/azure-cli,QingChenmsft/azure-cli,yugangw-msft/azure-cli,samedder/azure-cli