fix: runtime errors for ESM distributions

[petertonysmith94]

Relates to #1776

• Fixes the runtime error reported in the issue.
• Adds runtime verification to our package distributions.
  (All entrypoints run with node ${entrypoint})

---

Before

• You can see the error (in the CI), via our runtime verification script.
  https://github.com/FuelLabs/fuels-ts/actions/runs/8693652149/job/23840886861?pr=2060#step:5:22

After

• Runtime verification script passes.
  https://github.com/FuelLabs/fuels-ts/actions/runs/8694138186/job/23842408134?pr=2060#step:5:16

  # Install
  mkdir fixed-esm && \
    cd fixed-esm && \
    pnpm init && \
    pnpm install "@fuel-ts/abi-typegen@0.0.0-pr-2060-20240415184635" && \
    echo 'import "@fuel-ts/abi-typegen";' > main.mjs
  
  # Run
  node main.mjs

[github-actions]

This PR is published in NPM with version 0.0.0-pr-2060-20240415184635

[github-actions]

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