Update to the latest version of yarn.
Update the vendored version of yarn to the latest version.
This commit vendors yarn v1.22.4 into angular cli repo and updates yarnrc. Reference PR: https://github.com/angular/angular/pull/36464
Rather than enforcing yarn versioning using `package.json`'s engines value. We can utilize yarn's `yarn-path` value to ensure that the version of yarn used at execution time is consistent for everyone who uses our repo.
