[draft] Migrate from WSL1 to WSL2 (fixes #1055)

[obriat]

fixes #1055

Here a draft PR that remove WSL1 dependencies and add some helpers for WSL2.

My hypotheses:

• WSL2 should be seen as a standard Linux distribution (it's the current mode, since WSL2 is detected as Linux by fin).
• It should only work with *.docksal.site/192.168.64.100 DOCKSAL_NO_DNS_RESOLVER=1 (no dns container)
• It should only work with native docker : no virtual box or docker desktop

I keep some wsl function in order to do some operations (WIP):

• Check that windows FS is mounted on /c (change /etc/wsl.conf if not)
• Add a fixed IP 192.168.64.100 to WSL2
• Change hosts file on the windows side ?

Any helps or suggestions are welcome.