[Doc/Packaging] Provide instructions for installing history versions of Azure CLI

[jiasli]

We need to update the doc or maybe installation script to allow users to install history/old versions of Azure CLI in case of a regression, like #13625.

[yonzhan]

Feng Zhou (@fengzhou-msft) please take a look

[jiasli]

Some customers have already filed requests for this instruction at #13331, MicrosoftDocs/azure-docs-cli#1954, #13827 (comment), #13827 (comment).

#13827 is a very strong evidence showing the necessity.

Besides installing old versions, we need to provide instructions for how to list available versions on all platforms, so that users can install the specific ones.

For now, #13331 (comment) has some example commands showing how to install old versions.

[jiasli]

It will also be helpful to add instructions for how to install Azure CLI in air-gapped clouds.