`az extension add` : Ability to fail installation (or upgrade) if latest version cannot be installed

[nascarsayan]

Related command

az extension add

Is your feature request related to a problem? Please describe.

az extension add --upgrade installs or upgrades an extension. It does a compatibility check with the current version of azure-cli and installs an older version if az is old and if the latest extension version is not compatible with old az version.

Describe the solution you'd like

I'd like to have an option or flag to always install the latest version of extension. If the install or upgrade is not possible due to compatibility-issues, we should fail the operation instead of installing an older version.

Describe alternatives you've considered

Additional context

[yonzhan]

Thank you for opening this issue, we will look into it.

[jsntcy]

We'll discuss if this is a valid request.
+PMs @dcaro, @Jacekey23 for awareness.

BTW, the correct command should az extension add instead of az extension install.