#### Details
Migrates the repo's package manager from yarn v1 to yarn v3 (in
non-zero-installs configuration)
Some of this was mechanical based on [Yarn's migration
guide](https://yarnpkg.com/getting-started/migration). Beyond the steps
there, this PR:
* Updates assorted CI pipelines/workflows and dev docs to adapt to minor
syntax updates
* Updates CI workflow's caching strategy to use
`actions/setup-node@v3`'s built-in support for yarn berry friendly
caching instead of implementing our own with `actions/cache@v3`
* Updates license-check-and-add and prettier configs to exclude `.yarn/`
* Updates e2e `Dockerfile` to account for new changes
* Drops Lerna dependency in favor of plain Yarn workspaces, similar to
service and action
##### Motivation
* Simplifies some common dev commands. In particular, the command to
update report package snapshots changes from `yarn test:report:e2e -- --
-- -u` to just `yarn test:report:e2e -u`
* Consistency with other repos
* Allows for versioned resolutions (similar to
https://github.com/microsoft/accessibility-insights-action/pull/1596) -
I left modifying existing resolutions out of scope since this PR was
already pretty large without them, will cover them in a different PR
* Removes a dependency (Lerna)
##### Context
Similar PRs in other repos:
* https://github.com/microsoft/accessibility-insights-service/pull/2210
* https://github.com/microsoft/accessibility-insights-action/pull/1559
* https://github.com/microsoft/accessibility-insights-action/pull/1596
* https://github.com/microsoft/axe-sarif-converter/pull/935
* https://github.com/microsoft/accessibility-insights-docs/pull/1577
#### Pull request checklist
<!-- If a checklist item is not applicable to this change, write "n/a"
in the checkbox -->
- [n/a] Addresses an existing issue: #0000
- [x] Ran `yarn fastpass`
- [n/a] Added/updated relevant unit test(s) (and ran `yarn test`)
- [n/a] Verified code coverage for the changes made. Check coverage
report at: `<rootDir>/test-results/unit/coverage`
- [x] PR title *AND* final merge commit title both start with a semantic
tag (`fix:`, `chore:`, `feat(feature-name):`, `refactor:`). See
`CONTRIBUTING.md`.
- [n/a] (UI changes only) Added screenshots/GIFs to description above
- [n/a] (UI changes only) Verified usability with NVDA/JAWS
6222eb0972