chore(app): QOL: don't sign commits during e2e tests

[benjamincburns]

Issue for this PR

Closes#18295

Type of change

• Bug fix
• New feature
• Refactor / code improvement (QOL for local dev/test)
• Documentation

What does this PR do?

When I try to run e2e tests locally I get spammed by pinentry-touchid because I have git configured globally to sign commits. This simple one-line change disables commit signing for repositories used during e2e tests, preventing pinentry-touchid from ruining my day.

How did you verify your code works?

I ran e2e tests with the change in place.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

If you do not follow this template your PR will be automatically rejected.

[rekram1-node]

Automated PR Cleanup

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[benjamincburns]

This was ready to merge, no other work was necessary AFAIK