client: Miscellaneous tx related fixes for eth methods

[g11tech]

• extend RpcTx,
• blockOpt optional in estimateGas,
• improved tx fields validation

some eth tx method fixes extracted from shandong

• pre-shanghai: Shandong/EOF testnet setup #2316

[codecov]

Codecov Report

Merging #2411 (08d2d41) into master (fd121be) will decrease coverage by 1.68%.
The diff coverage is 92.10%.

Additional details and impacted files

Flag	Coverage Δ
block	89.42% <ø> (ø)
blockchain	90.21% <ø> (ø)
client	87.44% <92.10%> (+0.04%)	⬆️
common	98.13% <ø> (ø)
devp2p	91.65% <ø> (+0.21%)	⬆️
ethash	∅ <ø> (∅)
evm	79.72% <ø> (?)
rlp	?
statemanager	89.46% <ø> (ø)
trie	90.36% <ø> (+0.34%)	⬆️
tx	97.80% <ø> (ø)
util	83.89% <ø> (ø)
vm	85.41% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[acolytec3]

This looks good as far as it goes. I've spent the last hour trying to figure out how to run a test for a london block without success, but it would be good to add those tests to verify things work right for Typed Transactions. Will try to work on it some more and see if I can't get one that's valid.

[holgerd77]

Have re-labelled to "WIP" to reflect the latest comment, @acolytec3 please switch back to "Ready for review/merge" or something when you are done with the tests.

[acolytec3]

Finally got my new tests working. We'll see if this makes code coverage happy and will merge if so.

[acolytec3]

LGTM now that coverage is up!