tbs code not setting entry TTL

[kruskall]

APM Server version (apm-server version):

Description of the problem including expected versus actual behavior:

TBS code is setting the entry without the TTL:

apm-server/x-pack/apm-server/sampling/eventstorage/storage.go

Line 209 in 03ec442

return rw.txn.SetEntry(e)

This was spotted during the bugfix in #12120 (comment) but was kept as is. We should investigate whether this is a bug.

Steps to reproduce:

Please include a minimal but complete recreation of the problem,
including server configuration, agent(s) used, etc. The easier you make it
for us to reproduce it, the more likely that somebody will take the time to
look at it.

Provide logs (if relevant):

[carsonip]

This only affects cases where badger.ErrTxnTooBig happens. Nevertheless this is concerning.