## getPreferences function caching
Our `getPreferences` function used in the ui package is now wrapped in react cache, to minimize the amount of times it runs on a single request. This mimics the behavior of our other `getPreferences` function in the next package.
## getPreferences incorrect behavior
The `getPreferences` function in the next package was passing through the incorrect user slug. This would not have been noticeable in projects with just one users collection, but might break in projects with multiple users collections.
## getPreferences performance optimization
This PR adds `pagination: false` to the getPreferences payload.find() call, which will speed up the query.
## upsertPreferences transaction errors
Due to the potential of preference upsert operations running in parallel (e.g. when switching locales), this PR disables transactions in the preferences creation / update calls. This fixes the transaction errors reported in https://github.com/payloadcms/payload/issues/11310
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