stagedsync: add dbg.SaveHeapProfileNearOOM to headers stage (#11549) #11551
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cherry-pick 2a98f6a for E2
relates to:
#10734
#11387
restart Erigon with
SAVE_HEAP_PROFILE = true
env variable wait until we reach 45% or more alloc in stage_headers when "noProgressCounter >= 5" or "Rejected header marked as bad"