User can add push rule to a room he isn't member of

### Description

I executed this request for a user doesn't belong to the room_id `PUT /_matrix/client/v3/pushrules/global/room/` and I got 200 OK and when I checked the db:

```sql
select * from push_rules_enable
```

I can see a record created. This shouldn't be happening.

### Steps to reproduce

PUT /_matrix/client/v3/pushrules/global/room/

### Homeserver

localhost

### Synapse Version

1.90.0

### Installation Method

Other (please mention below)

### Database

Postgres single node

### Workers

Single process

### Platform

MACOS

### Configuration

_No response_

### Relevant log output

```shell
none
```

### Anything else that would be useful to know?

_No response_