Remove the specialised 'appservice' worker type

Part of #10441.

What I'm up to: Removing the `synapse.app.appservice` app type, letting you instead configure that with a global config option.

What the configs will look like:

<table>
<tr>
	<th>Old
	<th>Transitional
	<th>New
<tr>
	<td>

**main**

```
notify_appservices: false
```

**worker1**

```
worker_app: synapse.app.appservice
```

<td>

**main**

```
notify_appservices: false
notify_appservices_from_worker: worker1
```

**worker1**

```
worker_app: synapse.app.appservice
```

<td>

**main**

```
notify_appservices_from_worker: worker1
```

**worker1**

```
worker_app: synapse.app.generic_worker
```

</table>

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Uh oh!

Remove the specialised 'appservice' worker type #12446

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Uh oh!

Remove the specialised 'appservice' worker type #12446

Description

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions