RFR: 8275775: Add jcmd VM.classes to print details of all classes [v6]

[Yi Yang]

On Fri, 4 Mar 2022 08:14:39 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> Numbers should be aligned to the right. The following is what I want:
> 
> ```
>   62
>  123
> 4567
> ```

Done.

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PR: https://git.openjdk.java.net/jdk/pull/7105