algo: Replace fairlogger with flesnet_logging.

Replace fairlogger in libAlgo with flesnet_logging.

Reasons were discussed in !1159 (comment 29962)

Depends on !1161 (merged).

algo/CMakeLists.txt

@@ -74,6 +74,7 @@ target_link_libraries(Algo
   PUBLIC    OnlineData
             ROOT::GenVector
             GSL
+            fmt::fmt
             Boost::program_options
             Boost::filesystem
             xpu