Validator submits attestations after 1/3 of slot

[twoeths]

Describe the bug

When chain head comes late, validator does not submit attestations at 1/3 of slot

Apr-11 09:07:36.004[CHAIN]         ^[[36mverbose^[[39m: Clock slot slot=2762738
Apr-11 09:07:40.640[NETWORK]       ^[[36mverbose^[[39m: Received gossip block slot=2762738, root=0xcba7…c125, curentSlot=2762738, peerId=bafzaajiiaijcca7wtcs7spj2x2gr2xu5ersemiffsaejho5kkltxg4tizd72ltevoq
Apr-11 09:07:42.570[CHAIN]         ^[[36mverbose^[[39m: Block processed slot=2762738, root=0xcba7118064edba66d70c41c51c430452f7d4ff2f36ac9f599e91fd4d3bc1c125

at 09:07:40, validator should submit attestation but it keeps waiting for the new chain head

Apr-11 09:07:42.580[]              ^[[36mverbose^[[39m: Found new chain head slot=2762738, head=0xcba7118064edba66d70c41c51c430452f7d4ff2f36ac9f599e91fd4d3bc1c125, previouDuty=0xfcf446a30a758ed61d01303e13e06380174229c12416daed03f9ec7ad3c4acbf, currentDuty=0x6702d79fb792ebea57e3fc47b1b1329275d19da117e276122ea51c4b0c8e29c4
Apr-11 09:07:43.697[]                ^[[34mdebug^[[39m: Signed attestation slot=2762738, index=27, head=0xcba7118064edba66d70c41c51c430452f7d4ff2f36ac9f599e91fd4d3bc1c125, validatorIndex=200305
Apr-11 09:07:44.382[]                 ^[[32minfo^[[39m: Published attestations slot=2762738, index=27, count=1

Expected behavior

Validator should submit attestation when it either see new block, or 1/3 of slot, whichever comes first

This could be one of the causes of #3527

[twoeths]

at some points, this was called after 1/3 of the slot

await Promise.race([sleep(this.clock.msToSlotFraction(slot, 1 / 3), signal), this.waitForBlockSlot(slot)]);

so AttestationService keeps waiting for the block to come since it passes 1/3 of slot