Bumps the minimum node version from 16 to 18, updates the minimum
versions for 18, 20, and 22.

Migrates from Yarn 3 to 4 and replaces `constraints.pro` with JavaScript
constraints via `yarn.config.cjs`. Migrating to Yarn 4 required a change
to the Node / Yarn install flow in CI, which we solve by simply
copypasting the workflows from the module template as of
https://github.com/MetaMask/metamask-module-template/tree/570f6c2b80cb14fd61d5325131337401ae65c159.

#158)

This ensures that non-empty string `error.message` properties of
serialized errors are preserved by default, even if the serialized error
is not [a valid JSON-RPC
error](https://www.jsonrpc.org/specification#error_object). This
behavior can be overridden by setting `shouldPreserveMessage: false`.

In #61, our error serialization logic was considerably improved. One of
the behavioral changes made at the time was to always overwrite the
`message` property with that of the fallback error (practically always
the "internal JSON-RPC-error"), regardless of whether a non-empty string
message was present on the original error object. We have yet to ship
this everywhere in our stack, in part because such a change may be
breaking for our consumers. By reverting to the old behavior for the
`message` property only, we avoid these potential breakages and improve
the accessibility of potentially useful information to consumers (i.e.
directly in the error message as opposed to buried in
`error.data.cause.message`).

This is the release candidate for version 7.0.0.

---------

Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: Erik Marks <25517051+rekmarks@users.noreply.github.com>
Co-authored-by: legobeat <109787230+legobeat@users.noreply.github.com>