Improve CI script that runs --help on all commands (#4370)
Improve CI script that runs --help on all commands (#4370)

* Pool size of 5

* Print percentage less often.

* Minor change

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