Clean up utils/types-hoist folders from v9 migration

[lforst]

Description

For v9 we hoisted @sentry/utils and @sentry/types into @sentry/core. We did that in a bit of a "lazy" way by dumping everything in a utils-hoist and types-hoist folder respectively and doing export * from ....

Since export * from ... is rather error prone and makes bundlers unhappy because it makes them go look for exports, we should get rid of this patterns sooner rather than later and top-level-export all the api we intend to export.