Unpin cryptography package in azure-cli-core

[ivanst0]

Would it be possible to unpin the cryptography dependency by changing
cryptography>=3.2,<3.4
to
cryptography~=3.2
in /src/azure-cli-core/setup.py?

This change won't affect great majority of Azure CLI users (who are using prebuilt packages with cryptography==3.3.2).

The users who are still using an older OS which doesn't have rust support (e.g. Alpine) can still apply a simple workaround (installing cryptography==3.3.2 before installing Azure-CLI).
If it is important that install.py works on those platforms without any additional fixes, this script can be modified to install cryptography==3.3.2 before installing azure-cli.

[yonzhan]

@jiasli for awareness

[jiasli]

The reason an upper bound is set is explained in #15687 (comment).

By following https://cryptography.io/en/latest/installation/#building-cryptography-on-linux, I am now able to install cryptography on Alpine Linux (#19591).

Let me unpin the dependency on cryptography.