Use yarn from corepack instead of binary from yarnPath

[trivikr]

Issue

Corepack is favored over yarnPath in https://yarnpkg.com/blog/release/4.0#installing-yarn
Follow-up to #632

Description

yarn config unset yarnPath

Testing

CI

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[trivikr]

We'll wait for upstream fix in actions/setup-node#531, instead of adding complex workaround.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs and link to relevant comments in this thread.