fix: e2e working with aggregation 2/2 of message_id and merkle_root

[nambrot]

Description

• Removed the double mapping logic from the the merkle_tree_builder.get_proof() for fixing the following issue:

get_proof was expecting a nonce which it then uses to retrieve the leaf_index i.e. nonce -> message_id -> leaf_index and then prove_against_previous but in our case, we already got the leaf_index in merkle_tree_multisig.rs so what we end up doing is trying to look up the leaf_index twice and either not finding the message_id or proving wrong leaf_index which both causes the "cannot fetch metadata" for the merkle tree builder

Drive-by changes

• additional logging for aggregation to indicate which ism (moduleType, address) we are missing
• trace -> debug logging for sign_and_submit_checkpoint

Related issues

• closes https://github.com/hyperlane-xyz/issues/issues/695

Backward compatibility

Yes

Testing

e2e

[codecov]

Codecov Report

Merging #2861 (c4431e5) into v3 (09550c3) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##               v3    #2861   +/-   ##
=======================================
  Coverage   66.96%   66.96%           
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  Files          99       99           
  Lines        1017     1017           
  Branches      106      106           
=======================================
  Hits          681      681           
  Misses        296      296           
  Partials       40       40           

Components	Coverage Δ
core	50.00% <ø> (ø)
hooks	71.42% <ø> (ø)
isms	71.22% <ø> (ø)
token	58.41% <ø> (ø)
middlewares	81.46% <ø> (ø)

[yorhodes]

not sure what the unrelated changes are but probably @tkporter or @daniel-savu should approve first if you want to merge those

[tkporter]

lmk if you wanna chat about my suggestions - motivation is to remove all unwraps and to avoid the extra work just for logging purposes