Upgrade go-ethereum dependency to 1.14.3

[thaarok]

This PR contains changes related to the go-ethereum upgrade.

Notes:

• SetExternalHash in EvmHeader.EthHeader is not necessary, as the method

To be done in follow-ups:

• BlobHashes / BlobGasFeeCap / blobGasPrice should be handled (should not be used in current network configuration)
• GetStorageRoot should be wired to Carmen - depends on https://github.com/Fantom-foundation/Carmen/issues/887
• Check necessity of ethHeader.SetExternalHash usage in dummy_block.go - affects output of eth_subscribe("newHeads") / eth_newBlockFilter

[thaarok]

As "Replace Header.SetExternalHash by custom type for subscribed headers" introduces code, which duplicates header serialization in the ethapi RPC package, refactoring PR follows: https://github.com/Fantom-foundation/Sonic/pull/143 (moves both serializations into a single place)