New feature to set alias when I'm installing a new distro like a "--alias" param

I would like to able run multiples Ubuntu with same release version. But, the names are equal. I should be able to decide which distro run based to an alias.

For example:

```shell
$ wsl --install -d Ubuntu-20.04 --alias ExperimentalUbuntu
$ wsl --install -d Ubuntu-20.04 --alias MainUbuntu

$ wsl --list
Distribuições do Subsistema do Windows para Linux:
MainUbuntu Ubuntu-20.04 (Padrão)
ExperimentalUbuntu Ubuntu-20.04
```

I tried to find out how I can rename, but I need to deep diving in Registry Editor. Probably not recommended way

Start by tracing the `wsl --install` command and how installed distributions are registered and displayed by `wsl --list`. Use the requested examples to define the expected alias behavior, including multiple Ubuntu-20.04 installations, and verify that aliases are accepted and shown distinctly without relying on Registry Editor.

Written by the indexing model from the issue text.