[E2E][Load Tests] Feat e2e tests malformed payload preview

[adshmh]

Summary

Enhance Load Tests to output a preview of any malformed endpoint responses.

Primary Changes:

• Enhance Load Tests to output a preview of any malformed endpoint responses.

Issue

Not clear why an endpoint response failed parsing/validation.

• Issue or PR: #{ISSUE_OR_PR_NUMBER}

Type of change

Select one or more from the following:

• New feature, functionality or library
• Bug fix
• Code health or cleanup
• Documentation
• Other (specify)

QoS Checklist

E2E Validation & Tests

• make path_up
• make test_e2e_evm_shannon

Observability

• 1. make path_up
• 2. Run the following E2E test: make test_request__shannon_relay_util_100
• 3. View results in LocalNet's PATH Relay Grafana Dashboard

Sanity Checklist

• I have updated the GitHub Issue assignees, reviewers, labels, project, iteration and milestone
• For docs, I have run make docusaurus_start
• For code, I have run make test_all
• For configurations, I have updated the documentation
• I added TODOs where applicable