Tree: Allow filterBy to be a getter

[jacobtylerwalls]

Describe the bug

As described in https://github.com/orgs/primefaces/discussions/2659, the <Tree> can already support a getter for the filterBy prop, as long as you work around the fact that .split() is called on it first. If we remove that assumption, we can get lazy lookups for filtering.

PR: #6367

Use case

My tree data has multiple labels in multiple languages. Depending on other reactive state, I might prefer some of the labels over the others. I'm already templating the tree rows myself, so now I want to control the best label for filtering. I don't want to recompute the whole tree when the other reactive state changes. I just want to control the filtering behavior with a getter.

Reproducer

https://stackblitz.com/edit/tree-filter-by-getter

PrimeVue version

4.0.1

Vue version

4.x

Language

TypeScript

Build / Runtime

TypeScript

Browser(s)

No response

Steps to reproduce the behavior

See attached fiddle. I'm using getterWrapped when I'd like to just use getter.

Expected behavior

No response