Allow to trust built-in third-party filters

## Intro

Hi. :wave: Let's take a concrete example. For reasons I'll explain in the _Context_ section — sorry in advance for the length —, I wanted to switch from the built-in third-party `Fanboy's Annoyances` filter (with its [trustLevel set to "low"](https://github.com/AdguardTeam/FiltersRegistry/blob/4437cab56655c2039b88c559a38830244211c1fd/filters/ThirdParty/filter_122_FanboysAnnoyances/metadata.json#L15)) to the original `Fanboy's Annoyance List` (not having this limitation). Impossible unfortunately without a workaround (i.e. to use another URL) in `AdGuard for Windows` — unlike in `AdGuard Browser extension`.

## Proposed solutions

- :a: Either allow to check `Trusted filter` for built-in third-party filters …
_Possibly when it's added from the built-in list (in the add wizard) and/or … at least leave this possibility later (instead of [this](https://user-images.githubusercontent.com/4764956/185604734-d6cc6a08-ea57-4f8c-b7d0-9d1646a29ac6.png), have [that](https://user-images.githubusercontent.com/4764956/185604742-38b0d12e-12a3-48b0-8380-a9d4d59f8d69.png))._

    View the implications …

- The reported issues by the users should automatically mention this state for these filters.

- The AdGuard Filters team will need to ensure that they use these same conditions for their reproducibility tests.

- :bulb: If AdGuard does not want to take the risk of hosting third-party filter versions with risky rules inside, simply use the original source when the user checks "trusted filter" on an otherwise "low" one (AdGuard knows how to handle `+js` rules and stuff like that anyway).

- :b: And/Or, at the very least I want to say, if a person removes the built-in third-party `Fanboy's Annoyances` filter and adds manually the original one via its official address (`https://secure.fanboy.co.nz/fanboy-annoyance_ubo.txt`) **and** checks `Trusted filter`, do not redirect/hijack the URL towards the built-in limited version — as it seems to be now — nor convert it to this limited version format at this time either _(especially without notifying the user of this, I would add :relaxed:)_. `AdGuard Browser extension` does not suffer from this problem it seems.

## :mag: About this hijack

#### :heavy_multiplication_x: `AdGuard for Windows` current problematic state:

View it …

- **Initial state** — Built-in third-party `Fanboy's Annoyances` filter added:
[screenshot](https://user-images.githubusercontent.com/4764956/185612901-727bb247-c97b-43e3-a91c-aaa99670aa21.png)
:arrow_right_hook: Observe: 57551 rules.

- When removing it then adding manually a new filter with its official URL (which is: `https://secure.fanboy.co.nz/fanboy-annoyance_ubo.txt`):
[screenshot](https://user-images.githubusercontent.com/4764956/185613173-c1d872a8-9bc4-48e2-b9c4-591f49277609.png)
:arrow_right_hook: Observe: the name is not `Fanboy's Annoyance List` but has become `Fanboy's Annoyances` with `v0.0.0.0`. **#hijack**

- Once added:
[screenshot](https://user-images.githubusercontent.com/4764956/185613478-6472335e-effa-4dfc-ba74-b6260104be35.png)
:arrow_right_hook: Observe: 57551 rules _only_, name of the AG version and auto put in "Annoyances" section.

- NOW, when adding manually a new filter with _another_ URL to the same location **as a workaround** (using the following URL instead: `https://www.fanboy.co.nz/fanboy-annoyance_ubo.txt`):
[screenshot](https://user-images.githubusercontent.com/4764956/185613877-8ba65101-63db-4879-8586-9ee5d3289f13.png)
:arrow_right_hook: Observe: the name **is** correctly `Fanboy's Annoyance List` with the current version of the moment.

- Once added:
[screenshot](https://user-images.githubusercontent.com/4764956/185613918-e3d0cdcb-864a-4b2d-b4d0-cafe7ec779b0.png)
:arrow_right_hook: Observe: **59016** rules _as expected_, original name kept and put in the top section ("User" section).
 

#### :heavy_check_mark: `AdGuard Browser extension` current okay state:

View it …

- Adding manually a new filter with its official URL (which is: `https://secure.fanboy.co.nz/fanboy-annoyance_ubo.txt`):
[screenshot](https://user-images.githubusercontent.com/4764956/185619346-436b3cca-1d41-4f58-8987-fb23542f2f99.png)
:arrow_right_hook: Observe: **59015** rules _as expected_`*`, original name kept. NOT hijacked in this case unlike `AdGuard for Windows`.
 
_`*` (So, all the 59000+ rules. No need to worry about the 1 rule of difference versus `AdGuard for Windows` here, the `sha256sum` returned value for this file both accessed via "www." and "secure." is always identical for information.)_

- Once added:
[screenshot](https://user-images.githubusercontent.com/4764956/185619640-f776cece-5f01-4ff5-8684-27d4a77d6234.png)
:arrow_right_hook: Observe: original name kept, correct version of the moment. Tested and … additional rules are correctly present. :heavy_check_mark: