op-program: Remove caching for transition states

[ajsutton]

Description

Removes the cache of transition states. The agreed prestate is only requested once during the bootstrap process so no cache is needed.

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 45.82%. Comparing base (9881eda) to head (7a844ec).

Files with missing lines	Patch %	Lines
op-program/client/l2/cache.go	71.42%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #13714      +/-   ##
===========================================
- Coverage    47.23%   45.82%   -1.42%     
===========================================
  Files          958      901      -57     
  Lines        80012    75232    -4780     
  Branches       766      766              
===========================================
- Hits         37797    34472    -3325     
+ Misses       39311    38046    -1265     
+ Partials      2904     2714     -190     

Flag	Coverage Δ
cannon-go-tests-32	?
cannon-go-tests-64	?
contracts-bedrock-tests	90.49% <ø> (-0.16%)	⬇️

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

Files with missing lines	Coverage Δ
op-program/client/l2/cache.go	84.61% <71.42%> (+6.64%)	⬆️

... and 70 files with indirect coverage changes