Revert single step OVM_ETH migration

[mslipper]

The single-step OVM_ETH check followed by migration seemed to introduce errors into the migration. Specifically, a recent migration test yielded the following error:

Mar 15 00:48:22 migration-workstation migrate-l2-slipper-test.sh[112103]: ERROR[03-15|00:48:22.468] account has non-zero balance in state - should never happen addr=0x0000000000000000000000000000000000000000
Mar 15 00:48:22 migration-workstation migrate-l2-slipper-test.sh[112103]: CRIT [03-15|00:48:22.483] error in migration                       err="cannot migrate legacy eth: error in migration: account has non-zero balance in state - should never happen: 0x0000000000000000000000000000000000000000"

This implies that there is either a bug somewhere in the optimized code, or that there is an issue with modifying state while iterating it. This PR reverts the optimization, while retaining the corrected storage slots in check.go.

Reverts the following commits:

• d76a327.
• 9aa4a6c.
• f05c0b9.
• 918c1d7.

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Latest commit: e77d6b5

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[codecov]

Codecov Report

Merging #5147 (e77d6b5) into develop (7bdcb0f) will decrease coverage by 4.98%.
The diff coverage is 0.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5147      +/-   ##
===========================================
- Coverage    41.29%   36.31%   -4.98%     
===========================================
  Files          351      209     -142     
  Lines        21334    17242    -4092     
  Branches       776        0     -776     
===========================================
- Hits          8809     6262    -2547     
+ Misses       11854    10348    -1506     
+ Partials       671      632      -39     

Flag	Coverage Δ
bedrock-go-tests	36.31% <0.00%> (-0.75%)	⬇️
contracts-bedrock-tests	?
contracts-tests	?
core-utils-tests	?
dtl-tests	?
fault-detector-tests	?
sdk-tests	?

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

Impacted Files	Coverage Δ
op-chain-ops/ether/cli.go	0.00% <0.00%> (-100.00%)	⬇️
op-chain-ops/ether/migrate.go	0.00% <0.00%> (-69.68%)	⬇️
op-chain-ops/ether/precheck.go	0.00% <0.00%> (ø)
op-chain-ops/genesis/check.go	1.51% <ø> (ø)
op-chain-ops/genesis/db_migration.go	0.00% <0.00%> (ø)

... and 145 files with indirect coverage changes