feature: support multi server

[tris203]

Did you check the docs?

• I have read all the noice.nvim docs

Is your feature request related to a problem? Please describe.

Nightly supports multiple clients for hover and the results being merged
Noice doesn't yet

If you have 3 LSPs attached to one buffer, and do a hover request where 1/3 responds with a result. You will get 2 "No Information Found" notifications and the hover result

Describe the solution you'd like

allow for multiple server results to be merged

Describe alternatives you've considered

Turning the silent flag on for hover

Additional context

No response