chore: reduce allocations

[hoank101]

Description

closes: #XXXX

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Summary by CodeRabbit

• Performance Improvements
  • Enhanced initialization of data structures in various modules to improve memory management and performance during data processing tasks.

[coderabbitai]

Walkthrough

The recent changes across various modules primarily focus on optimizing memory allocation by pre-sizing slices based on anticipated lengths. This adjustment is evident in different contexts, from event handling in interchain accounts to JSON key processing and state updates in light clients. These modifications aim to enhance performance by reducing the overhead associated with dynamic slice growth.

Changes

File Path	Change Summary
.../host/client/cli/query.go	Initialized resEvents with a specific capacity in GetCmdPacketEvents.
.../transfer/types/transfer_authorization.go	Changed keys slice initialization to have a specific capacity in JSON handling.
.../08-wasm/keeper/keeper.go	GetAllChecksums now pre-sizes checksums slice based on keys length.
.../08-wasm/light_client_module.go	UpdateState initializes heights with specific length in LightClientModule.

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[crodriguezvega]

good optimisations, @hoank101!