fix: reduce flakiness by favoring port 0 over portfinder dependency

[nedsalk]

Summary

This PR replaces the portfinder dependency with the ephemeral port 0 via which the OS is given reins to assign whichever free port it sees fit.

This PR should stop the flakiness that occurs because of trying to start a node on a port that's already in use. I believe that the underlying cause of this is that the free port number given by portfinder gets taken by a different node in some other test before the flaky test's node starts. By using port 0, the real port is only given to the fuel-core node by the OS upon starting of the node, so conflicts like these won't happen.

Checklist

• All changes are covered by tests (or not applicable)
• All changes are documented (or not applicable)
• I reviewed the entire PR myself (preferably, on GH UI)
• I described all Breaking Changes (or there's none)

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Name	Status	Preview	Comments	Updated (UTC)
create-fuels-template	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 27, 2024 11:07am
ts-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 27, 2024 11:07am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
create-fuels-counter-example	⬜️ Ignored (Inspect)			Sep 27, 2024 11:07am

[github-actions]

Coverage Report:

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76.38%(+0%)	71.61%(+0%)	75.49%(+0%)	76.54%(+0%)

Changed Files:

Coverage values did not change👌.