Evaluate the usage of trace file identifier per default

[johscheuer]

What would you like to be added/changed?

There is a case where the log dir can be spammed with new trace log files (see: https://forums.foundationdb.org/t/fdb-log-files-accumulating-for-old-process-and-wasnt-cleaned-when-there-is-a-new-process/3531/2). We should evaluate the usage of the trace file identifier and if that works we should consider to use this as the default: https://github.com/apple/foundationdb/blob/main/fdbclient/vexillographer/fdb.options#L57-L59