refactor(starknet_batcher): move around some types and utils to a common utils file

[dafnamatsry]

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[reviewable-StarkWare]

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[dafnamatsry]

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• refactor(starknet_batcher): add tests and refactor batcher_test #2640
• refactor(starknet_batcher): delete the proposal manager #2618
• refactor(starknet_batcher): move around some types and utils to a common utils file #2622 👈 (View in Graphite)
• refactor(starknet_batcher): validate flow refactor #2441
• refactor(starknet_batcher): rename GetProposalResultError and remove the ProposalNotFound variant #2483
• refactor(starknet_batcher): add getters to the proposal manger #2480
• main

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[codecov]

Codecov Report

Attention: Patch coverage is 85.52632% with 11 lines in your changes missing coverage. Please review.

Project coverage is 6.52%. Comparing base (fe25e29) to head (3bc9a7f).

Files with missing lines	Patch %	Lines
crates/starknet_batcher/src/utils.rs	85.52%	8 Missing and 3 partials ⚠️

Additional details and impacted files

@@                                    Coverage Diff                                    @@
##           12-04-refactor_starknet_batcher_validate_flow_refactor   #2622      +/-   ##
=========================================================================================
+ Coverage                                                    6.49%   6.52%   +0.02%     
=========================================================================================
  Files                                                         141     142       +1     
  Lines                                                       17182   17181       -1     
  Branches                                                    17182   17181       -1     
=========================================================================================
+ Hits                                                         1116    1121       +5     
+ Misses                                                      15989   15983       -6     
  Partials                                                       77      77              

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[alonh5]

Reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @dafnamatsry and @Yael-Starkware)

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crates/starknet_batcher/src/utils.rs line 24 at r1 (raw file):

pub(crate) enum ProposalError {
    #[error(transparent)]
    BlockBuilderError(Arc<BlockBuilderError>),

BlockBuilderError has an Aborted variant. Can we use it and remove the ProposalError completely?