evm: Fix the gasCost logs in op code trace

[g11tech]

While matching op code trace of ethereumjs with the geth it was observed that ethereumjs's gasCost logs were incorrect w.r.t the actual gas used by the opcode.

This was happening because the dynamicFee should be the one to be logged which is the actual gas consumed by the opcode

Post this the gasCost mismatch diff with geth greatly reduced and the 0 gasCost entries disappeared from the trace

[codecov]

Codecov Report

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Additional details and impacted files

Flag	Coverage Δ
block	90.30% <0.00%> (?)
blockchain	90.48% <0.00%> (?)
client	86.86% <0.00%> (?)
common	95.76% <0.00%> (?)
devp2p	91.84% <0.00%> (?)
ethash	∅ <0.00%> (?)
evm	79.33% <0.00%> (?)
rlp	∅ <0.00%> (?)
statemanager	88.53% <0.00%> (?)
trie	90.02% <0.00%> (?)
util	81.34% <0.00%> (?)
vm	84.39% <0.00%> (?)

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

[holgerd77]

LGTM