fixes https://github.com/payloadcms/payload/issues/8455 and
https://github.com/payloadcms/payload/issues/8462
- Builds the `_locale` column for the `_rels` when it's inside of a
localized group / tab
- Properly builds `sanitizedPath` for blocks in the transform-read
function when it's inside of a localized field. This fixes with fields
inside that have its own table (like `_rels`, select `hasMany: true`
etc)
Adds _more_ tests!
## Description
In Postgres, localized blocks or arrays that contain other array / block
/ relationship fields were not properly storing locales in the database.
Now they are! Need to check a few things yet:
- Ensure test coverage is sufficient
- Test localized array, with non-localized array inside of it
- Test localized block with relationship field within it
- Ensure `_rels` table gets the `locale` column added if a single
non-localized relationship exists within a localized array / block
Fixes step 6 as identified in #7805
