ref(sveltekit): Handle SvelteKit-generated spans in `sentryHandle`#17423

Lms24 wants to merge 4 commits intodevelopgetsentry/sentry-javascript:developfrom

lms/ref-sveltekit-tracing-handle-no-spansgetsentry/sentry-javascript:lms/ref-sveltekit-tracing-handle-no-spansCopy head branch name to clipboard