fix: withdrawal time

[tynes]

Description
Adds a fix for the withdrawal window as well as test coverage. We need to do some hardcore testing of the proof validation logic still

[codecov-commenter]

Codecov Report

Merging #429 (1449e24) into sc/base-messenger (e2da9e2) will decrease coverage by 1.56%.
The diff coverage is n/a.

@@                  Coverage Diff                  @@
##           sc/base-messenger     #429      +/-   ##
=====================================================
- Coverage              53.10%   51.54%   -1.57%     
=====================================================
  Files                     62       57       -5     
  Lines                   6498     5781     -717     
=====================================================
- Hits                    3451     2980     -471     
+ Misses                  2608     2431     -177     
+ Partials                 439      370      -69     

Impacted Files	Coverage Δ
opnode/contracts/deposit/deposit_feed_raw.go	5.21% <ø> (ø)
opnode/l2/api.go	60.00% <0.00%> (-14.20%)	⬇️
opnode/test/geth.go	63.93% <0.00%> (-0.87%)	⬇️
bss/sequencer/driver.go	74.26% <0.00%> (-0.74%)	⬇️
opnode/test/setup.go	72.12% <0.00%> (-0.70%)	⬇️
opnode/service.go	0.00% <0.00%> (ø)
opnode/eth/heads.go	69.56% <0.00%> (ø)
opnode/node/config.go	33.33% <0.00%> (ø)
opnode/rollup/types.go	18.18% <0.00%> (ø)
opnode/rollup/driver/driver.go	100.00% <0.00%> (ø)
... and 11 more

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