Update version to 4.2.2

[adpaco-aws]

Description of changes

This PR updates the version to 4.2.2 in preparation for its release.

There are a bunch of dependencies being removed. I'm guessing that's because the changes to the Cargo.lock file were not committed after reverting #1277 on the release branch.

Checklist for requesting a review

The change in this PR is (choose one, and delete the other options):

• [x] A change "invisible" to users (e.g., documentation, changes to "internal" crates like cedar-policy-core, cedar-validator, etc.)

I confirm that this PR (choose one, and delete the other options):

• [x] Does not update the CHANGELOG because my change does not significantly impact released code.

I confirm that cedar-spec (choose one, and delete the other options):

• [x] Does not require updates because my change does not impact the Cedar formal model or DRT infrastructure.

I confirm that docs.cedarpolicy.com (choose one, and delete the other options):

• [x] Does not require updates because my change does not impact the Cedar language specification.