(CAT-1643) Update childprocess and remove patch

[david22swan]

Previously a specific patch was required in order to have the code work as intended, however a patch has since been moved into the gem and so we can remove our patch and update the dependency.

Checklist

• [x] 🟢 Spec tests.
• [x] 🟢 Acceptance tests.
• [x] Manually verified.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.24%. Comparing base (78e8249) to head (224d9fe).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1356 +/- ## ========================================== + Coverage 87.81% 88.24% +0.43% ========================================== Files 129 128 -1 Lines 5489 5435 -54 ========================================== - Hits 4820 4796 -24 + Misses 669 639 -30 ```

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[david22swan]

Just waiting on pipeline fix to merge