FindProtobuf: Support new version number scheme
Protobuf changed it's version number scheme with version 21. The first number (usually the major version) is not synchronized between compiler and library version, but the second and third number are. See https://protobuf.dev/news/2022-05-06/ for more details.
Fixes: #24847 (closed)
Backport: release
Topic-rename: FindProtobuf-version-schemes
Edited by Brad King