fix: show correct gas limit for synthetic txs

[skosito]

Description

How Has This Been Tested?

• Tested CCTX in localnet
• Tested in development environment
• Go unit tests
• Go integration tests
• Tested via GitHub Actions

Summary by CodeRabbit

• Bug Fixes

  • Ensured the correct gas limit is displayed for synthetic transactions.

• New Features

  • Added gas limit information to transaction details for improved visibility in synthetic and EVM-related transactions.

• Documentation

  • Updated the changelog to reflect the latest fix.

• Chores

  • Upgraded a dependency to a newer version for improved stability and compatibility.

[coderabbitai]

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📝 Walkthrough

Walkthrough

The changes introduce a new mechanism for capturing and propagating the gas limit of synthetic Ethereum transactions throughout the codebase. This includes updating event emission to include the gas limit, extending data structures to store and forward this value, and ensuring that the correct gas limit is displayed in RPC responses. The dependency on ethermint is also updated.

Changes

File(s)	Change Summary
changelog.md	Added entry for PR #3920 documenting the fix for correct gas limit display in synthetic transactions.
go.mod	Updated github.com/zeta-chain/ethermint dependency to a newer version.
rpc/types/events.go	Added GasLimit field to ParsedTx; parses and propagates gas limit from event attributes.
rpc/types/types.go	Added GasLimit field to TxResultAdditionalFields struct.
rpc/backend/blocks.go, rpc/types/utils.go	Changed logic to use GasLimit instead of GasUsed when constructing synthetic/RPC transactions.
x/fungible/keeper/evm.go	Emits the gas limit as an event attribute for synthetic transactions.

Sequence Diagram(s)

sequenceDiagram
    participant EVM as EVM Module
    participant Keeper as Fungible Keeper
    participant Event as Event System
    participant RPC as RPC Layer
    participant Client as Client

    Client->>RPC: Request synthetic transaction details
    RPC->>Event: Query for transaction events
    Event->>Keeper: Retrieve event attributes (includes GasLimit)
    Keeper->>Event: Emit event with GasLimit attribute
    Event->>RPC: Return attributes (GasLimit included)
    RPC->>Client: Respond with transaction info (correct GasLimit)

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[lumtis]

Good catch

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.94%. Comparing base (4641c74) to head (b8c908f).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3920   +/-   ##
========================================
  Coverage    64.94%   64.94%           
========================================
  Files          470      470           
  Lines        34386    34391    +5     
========================================
+ Hits         22331    22336    +5     
  Misses       11024    11024           
  Partials      1031     1031           

Files with missing lines	Coverage Δ
x/fungible/keeper/evm.go	85.27% <100.00%> (+0.12%)	⬆️

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