Bug Description

You can't use the where modifier on a list of terms, in an entry.

How to Reproduce

1. Create a taxonomy, tags and have a foo text field on it
2. Add 3 terms, 2 of which have bar in the foo field
3. Add that taxonomy to a collection
4. Create an entry and add those 2 terms to it
5. In the entry template have:

{{ tags where="foo:bar" }}
    {{ title }}
{{ /tags}}

I'd expect to see those two terms, but nothing is shown.

Extra Detail

Entry:

---
title: 'Some tags'
tags:
  - blue
  - green

Term:

title: Blue
order: 2
updated_by: e8982d24-f8f9-4e2f-9286-062f9d98aa4a
updated_at: 1620098429
foo: bar

Blueprint:

title: Posts
template: post
layout: layout
mount: 65d2c20e-e54a-4b0a-866c-d8176e5dd2f3
taxonomies:
  - tags

Environment

Statamic 3.1.11 Pro
Laravel 8.40.0
PHP 8.0.5
No addons installed