Version protoc according to the compiler version number.

Previously we were using the C++ runtime version, which includes an extra major version number.  See #12064

PiperOrigin-RevId: 513049588

CMakeLists.txt

@@ -125,7 +125,7 @@ message(STATUS "${protobuf_VERSION_PRERELEASE}")
 
 # Package version
 set(protobuf_VERSION
-  "${protobuf_VERSION_MAJOR}.${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}")
+  "${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}")
 
 if(protobuf_VERSION_PRERELEASE)
   set(protobuf_VERSION "${protobuf_VERSION}.${protobuf_VERSION_PRERELEASE}")