Parse candid argument early

[nmattia]

I've noticed that the --argument is not parsed when invoked, but only later one when used. Here's an example:

dfx deploy --no-wallet --argument 'version_info = "hello"'

Doing this, my canister will be built (~2mn) before I get a parse error. It would be great to fail early.

[sesi200]

Tracked in SDK-648