Fix no active span when trying to log tracing error on startup#18959

MadLittleMods merged 3 commits intodevelopelement-hq/synapse:developfrom

madlittlemods/fix-no-active-span-on-error-startupelement-hq/synapse:madlittlemods/fix-no-active-span-on-error-startupCopy head branch name to clipboard