homebrew formula do not pass the `brew audit --strict` check

> ### `az feedback` auto-generates most of the information requested below, as of CLI version 2.0.62

**Describe the bug**
As homebrew update the audit rule, azure-cli's formula will not pass the audit check.

`brew audit --strict azure-cli.rb` will report below errors:

> Error: 5 problems in 1 formula detected
> azure-cli:
> * 1: col 1: Class has too many lines. [594/100]
> * 1: col 1: Missing top-level class documentation comment.
> * 1: col 1: Missing frozen string literal comment.
> * 714: col 3: Assignment Branch Condition size for install is too high. [<3, 21, 3> 21.42/17]
> * 714: col 3: Method has too many lines. [17/10]
>

We need to update the homebrew formula template according to the latest rule.

**To Reproduce**

**Expected behavior**

**Environment summary**

**Additional context**