Make the Tracy layer optional, even when compiled with feature = "tracing-tracy"#24109

nfagerlund wants to merge 3 commits intobevyengine:mainbevyengine/bevy:mainfrom

nfagerlund:nf/may26-optional-tracy-clientnfagerlund/bevy:nf/may26-optional-tracy-clientCopy head branch name to clipboard