op-program: Implement oracle backed engine API backend

[ajsutton]

Description

Implements an engine API backend that utilises information from the L2 oracle.

Tests

Reuses the existing engine API tests to verify the integration between the engine API and backend, plus a bunch of unit tests

Metadata

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

TODOs

• Author or reviewer has added an entry to the current release notes draft, if appropriate.

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Latest commit: 1d673ee

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[codecov]

Codecov Report

Merging #5361 (1d673ee) into develop (b0a2d00) will decrease coverage by 0.78%.
The diff coverage is 81.56%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5361      +/-   ##
===========================================
- Coverage    38.88%   38.10%   -0.78%     
===========================================
  Files          395      241     -154     
  Lines        26402    22014    -4388     
  Branches       838        0     -838     
===========================================
- Hits         10267     8389    -1878     
+ Misses       15354    12854    -2500     
+ Partials       781      771      -10     

Flag	Coverage Δ
bedrock-go-tests	38.10% <81.56%> (+2.81%)	⬆️
common-ts-tests	?
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-program/l2/engine_backend.go	78.51% <78.51%> (ø)
op-program/l2/engineapi/block_processor.go	74.24% <100.00%> (+74.24%)	⬆️
op-program/l2/engineapi/l2_engine_api.go	61.60% <100.00%> (+61.60%)	⬆️
...p-program/l2/engineapi/test/l2_engine_api_tests.go	100.00% <100.00%> (+100.00%)	⬆️

... and 160 files with indirect coverage changes

[protolambda]

LGTM

[mergify]

This PR has been added to the merge queue, and will be merged soon.

[mergify]

This PR is next in line to be merged, and will be merged as soon as checks pass.