Check for topic when parsing deposit contract logs

[gumb0]

Turns out on Sepolia deposit contract is different and can emit other logs (ERC20's Transfer)

[shemnon]

LGTM. This is how all the other clients approach it.

[chfast]

Can we have a regression test for this?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.54%. Comparing base (4d363c3) to head (e9ba681).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1152   +/-   ##
=======================================
  Coverage   94.54%   94.54%           
=======================================
  Files         168      168           
  Lines       18246    18256   +10     
=======================================
+ Hits        17251    17261   +10     
  Misses        995      995           

Flag	Coverage Δ
eof_execution_spec_tests	22.46% <16.66%> (-0.01%)	⬇️
ethereum_tests	28.28% <16.66%> (-0.02%)	⬇️
ethereum_tests_silkpre	20.97% <0.00%> (-0.02%)	⬇️
execution_spec_tests	20.95% <25.00%> (-0.01%)	⬇️
unittests	89.82% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
test/state/requests.cpp	96.66% <100.00%> (+0.23%)	⬆️
test/state/requests.hpp	90.00% <ø> (ø)
test/unittests/state_deposit_requests_test.cpp	100.00% <100.00%> (ø)

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[chfast]

Rebase on top of #1159 and add a regression test.