Release v1.44.0-rc.0

Changelog Full Changelog Features emit fast_confirmation SSE event per beacon-APIs ( #9439 ) ( @nazarhussain ) fast confirmation rule ( #8837 ) ( @nazarhussain ) expose EMPTY_BLOCK_HASH constant in config API ( #9465 ) ( @markolazic01 ) implement EIP-8045 exclude slashed validators from proposing ( #9422 ) ( @nflaig ) force the proposer to reorg late payloads ( #9431 ) ( @nflaig ) only give…