POC: migrate to yarn 3

[pavolloffay]

See https://yarnpkg.com/migration/guide

yarn set version 3.8.5

Which problem is this PR solving?

Description of the changes

How was this change tested?

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: yarn lint and yarn test

[yurishkuro]

Are you checking in yarn source code? Can we not use global install like before?

[andreasgerstmayr]

Are you checking in yarn source code? Can we not use global install like before?

afaics we have two options when using yarn v2+:

• use the experimental corepack feature
• or commit the yarn sources

see yarnpkg/berry#5748 for more details