Gossip block signatures verification on main thread

[twoeths]

Describe the bug

Right now we verify gossip block proposer's signature on main thread but all other signatures on worker thread

Expected behavior

• Need to understand if it's better to also verify all gossip block's signatures on main thread because the faster we process the gossip block the better
• Add metric to track the time for it

[twoeths]

with v1.8.0-rc.0 the time to verify execution payload is bigger so it may not be a priority atm

• block slot 6314643

  581396:Apr-27 12:49:00.129[network]       verbose: Received gossip block slot=6314643, root=0x9ddc…0070, curentSlot=6314643, peerId=16Uiu2HAm3R979jPjTqW5Vdt16H7x6Kn6j91BsmvGL2C5CSDQyfo4, delaySec=1.1129999160766602, recvToVal=0.016000032424926758
  581397:Apr-27 12:49:00.206[chain]         verbose: Transitioned gossip block slot=6314643, recvToTransition=0.09300017356872559
  581398:Apr-27 12:49:00.235[chain]         verbose: Verified block signatures slot=6314643, recvToSigVer=0.12199997901916504
  581399:Apr-27 12:49:00.337[chain]         verbose: Verified execution payload slot=6314643, recvToVerifiedExecPayload=0.2239999771118164
  581405:Apr-27 12:49:00.891[chain]         verbose: Imported block slot=6314643, recvToImportedBlock=0.7780001163482666

• block slot 6314644

  581623:Apr-27 12:49:12.138[network]       verbose: Received gossip block slot=6314644, root=0x92b3…b540, curentSlot=6314644, peerId=16Uiu2HAm3R979jPjTqW5Vdt16H7x6Kn6j91BsmvGL2C5CSDQyfo4, delaySec=1.1170001029968262, recvToVal=0.020999908447265625
  581624:Apr-27 12:49:12.238[chain]         verbose: Transitioned gossip block slot=6314644, recvToTransition=0.12099981307983398
  581625:Apr-27 12:49:12.284[chain]         verbose: Verified block signatures slot=6314644, recvToSigVer=0.16699981689453125
  581626:Apr-27 12:49:12.428[chain]         verbose: Verified execution payload slot=6314644, recvToVerifiedExecPayload=0.31099987030029297

slot	recvToVal	recvToTransition	recvToSigVer	recvToVerifiedExecPayload
6314643	0.016	0.093	0.1219	0.2239
6314644	0.02099	0.12099	0.16699	0.31099
6314645	0.045	0.1319	0.158	0.305
6314646	0.0169	0.0959	0.1229	2.14

[wemeetagain]

@twoeths can this be closed?