fix: Fixed race condition with debug tasks

[bmingles]

Running the debugger was intermittently failing due to a race condition with the npm clean script deleting the out directory. This fix should ensure clean is completed before the 2 watch tasks start.

[github-actions]

End-to-end Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
6	6	0	0	0	0	0	04:54:53

A ctrf plugin

Detailed Test Results

Name	Status	ms	Flaky 🍂
should default to the correct settings	passed ✅	1828
should return custom settings: Empty configs	passed ✅	113
should return custom settings: Populated configs	passed ✅	184
should be able to load VSCode	passed ✅	478
should only be visible when a supported file type is active: test.groovy	passed ✅	3213
should only be visible when a supported file type is active: test.py	passed ✅	1112

A ctrf plugin

Failed Test Summary

No failed tests ✨

Flaky Test Summary

No flaky tests detected. ✨