Consider dropping the suffix Protocol from ConfigSnapshotProtocol

[czechboy0]

Came from the file provider review: https://forums.swift.org/t/proposal-sco-0001-generic-file-providers/82824/2

cc @FranzBusch

[czechboy0]

Let's just do a pass over the whole API for Type, Protocol, etc suffixes and discuss which ones to remove and which to keep.

[czechboy0]

The main one is: ConfigSnapshotProtocol, should it just become ConfigSnapshot?

[FranzBusch]

The main one is: ConfigSnapshotProtocol, should it just become ConfigSnapshot?

SGTM!