feat: add EventQueue class util to guarantee the order of user-storage updates

[mathieuartu]

Explanation

This PR add a new EventQueue shared class util to the @metamask/profile-sync-controller package.
We are using this to ensure user-storage updates are executed and fulfilled in the actual order they were called.
For now, this is used for account syncing when reacting to AccountsController accountRenamed and accountAdded events.

This addition has been made in reaction to a recent change to extension code that made it so that when a user adds a new account, without changing the default name, both accountAdded and accountRenamed were fired.
This induced race conditions where we weren't in control of which user-storage request would land first.
With this change, we raise back our confidence to 100%.

References

• Fixes: https://consensyssoftware.atlassian.net/browse/IDENTITY-124

Changelog

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes