fix(cli): fix --cwd

[paul-soporan]

What's the problem this PR addresses?

There are 2 code paths here:

berry/packages/yarnpkg-cli/sources/main.ts

Line 64 in 215455f

if (yarnPath !== null && !ignorePath) {

The --cwd option is only checked for on the else branch, so when run is called after --cwd is encountered, there is a possibility that the if branch will execute with the --cwd option that was already encountered.

This causes commands to be executed in the wrong directory in some cases.

This PR closes #1056.

How did you fix it?

I made the --cwd flag and its argument get removed from process.argv when --cwd is encountered.

[arcanis]

🚀