chore: Set Yarn version and improve workflows

[markandrus]

Description of changes

This PR

• Sets the Yarn version to 3.6.0. I have seen that, after publishing, the lockfile would change. In the past, I've noticed this happens with some versions of Yarn, and may be fixed in recent versions.
• Removes some redundant build steps from the publish workflows. We already build everything during the first action of these workflows. After that, monodeploy is going to build again. We don't need to build a third time… additionally, we should find a way to build only once.

Checklist

Before merging to main:

• Tests
  • N/A
• Manually tested in React apps
  • N/A
• Release notes
  • This relates only to the build system and can be omitted.
• Approved

Release notes

N/A

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Name	Status	Preview	Comments	Updated (UTC)
ui-kit	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 15, 2023 3:30pm