eth/api_tracer.go: enable preimage recording when tracing #15787
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Enables preimage recording (#3543) when tracing a tx with
debug_traceTransaction
. Recorded preimages will then be available through requests todebug_preimage
.This is useful if the user the user doesn't want to re-sync from the genesis block with
--vmdebug
, and is only interested in preimages around specific transactions.