2 tests for yarn doesn't pass on windows `by default`

[PatrykKuniczak]

Describe the bug

If somebody(like me) doesn't have yarn installed globally.

For packages/wxt those 2 tests doesn't pass:

To fix it, i need to install yarn globally (Only sad reaction)

To make better DX, we can place yarn as a devDeps inside this package.
But the big problem is:

And it seems not supported anymore:
Latest version have over 2 years:
https://www.npmjs.com/package/yarn

There's no move in repo:
https://github.com/yarnpkg/yarn/commits/master/

I think good idea is to get rid of this package and those tests.

PS:
OKK yarn drops support for version 1 and changed repo:
https://github.com/yarnpkg/berry/releases

IT'S berry right now???

Used Package Manager

yarn

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[aklinker1]

We should skip the tests if yarn isn't installed. CI checks it, that's good enough