## What
Before this PR, an internal link in the Lexical editor could reference a
document from a different tenant than the active one.
Reproduction:
1. `pnpm dev plugin-multi-tenant`
2. Log in with `dev@payloadcms.com` and password `test`
3. Go to `http://localhost:3000/admin/collections/food-items` and switch
between the `Blue Dog` and `Steel Cat` tenants to see which food items
each tenant has.
4. Go to http://localhost:3000/admin/collections/food-items/create, and
in the new richtext field enter an internal link
5. In the relationship select menu, you will see the 6 food items at
once (3 of each of those tenants). In the relationship select menu, you
would previously see all 6 food items at once (3 from each of those
tenants). Now, you'll only see the 3 from the active tenant.
The new test verifies that this is fixed.
## How
`baseListFilter` is used, but now it's called `baseFilter` for obvious
reasons: it doesn't just filter the List View. Having two different
properties where the same function was supposed to be placed wasn't
feasible. `baseListFilter` is still supported for backwards
compatibility. It's used as a fallback if `baseFilter` isn't defined,
and it's documented as deprecated.
`baseFilter` is injected into `filterOptions` of the internal link field
in the Lexical Editor.
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