It should not be possible to copy links to private rooms & spaces

### Steps to reproduce

1. create private space "for your teammates"
2. click one of the buttons that opens the invite modal
3. click the "share this space" link
4. share the link to your teammates

### Outcome

#### What did you expect?
teammates join my space

#### What happened instead?
teammates complain the link doesn't work (because it's a private space)

#### What should realistically happen
it should not be possible to copy the link to private rooms or spaces

### Operating system

arch

### Browser information

firefox

### URL for webapp

develop.element.io

### Application version

Element version: 7f3d85c0c541-react-dd6097c5687e-js-c18d691ef5d3 Olm version: 3.2.14

### Homeserver

synapse 1.89.0

### Will you send logs?

No

Start by reproducing the issue on develop.element.io in Firefox: create a private space, open the invite modal, and follow the “share this space” link. Trace that private-room or space sharing flow; done means private rooms and spaces no longer offer a copyable share link while the intended teammate invite path remains usable.

Written by the indexing model from the issue text.