op-program: Implement wrapper methods required by derive.Engine

[ajsutton]

Description

Implement wrapper methods required by derive.Engine. This is pretty much just sugar over the existing backend methods, performing some additional conversions.

Adds flags to specify the l2 execution genesis and agreed l2 starting head.

Additional context

Builds on #5361

Metadata

• Fixes https://linear.app/optimism/issue/CLI-3741/l2-oracle-backed-execution-engine

[changeset-bot]

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Latest commit: ed4adee

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[codecov]

Codecov Report

Merging #5364 (96cbdb8) into develop (6edd990) will decrease coverage by 0.15%.
The diff coverage is 57.54%.

❗ Current head 96cbdb8 differs from pull request most recent head ed4adee. Consider uploading reports for the commit ed4adee to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5364      +/-   ##
===========================================
- Coverage    38.44%   38.30%   -0.15%     
===========================================
  Files          342      243      -99     
  Lines        24921    22112    -2809     
  Branches       597        0     -597     
===========================================
- Hits          9581     8469    -1112     
+ Misses       14533    12860    -1673     
+ Partials       807      783      -24     

Flag	Coverage Δ
bedrock-go-tests	38.30% <57.54%> (+0.22%)	⬆️
common-ts-tests	?
contracts-bedrock-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-program/cmd/main.go	68.85% <0.00%> (ø)
op-program/l2/l2.go	0.00% <0.00%> (ø)
op-program/l2/engine.go	66.07% <66.07%> (ø)
op-program/config/config.go	100.00% <100.00%> (ø)
op-program/flags/flags.go	100.00% <100.00%> (ø)

... and 106 files with indirect coverage changes

[mergify]

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[mergify]

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