MSC3938: Remove `{keyID}` from key lookups over federation #109

Job	Run time
Linting	2m 27s
Build for Linux (linux, amd64)	1m 47s
Build for Windows (windows, amd64)	2m 27s
Unit tests	3m 35s
Build for Linux (linux, 386)	1m 43s
WASM build test	0s
Initial tests passed	3s
Upgrade tests from HEAD-2	0s
Sytest (${{ matrix.label }})	0s
Complement (${{ matrix.label }})	0s
Integration tests	0s
Upgrade tests	0s
Integration tests passed	2s
Update Docker images	0s
	12m 4s

Provide feedback