fix bug with unittest debug not having args #8083

Job	Run time
Create VSIX	3m 6s
Check Python types	2m 6s
Coverage (ubuntu-latest)	13m 12s
Lint	3m 3s
Python Tests (ubuntu-latest, 3.8)	2m 13s
Python Tests (ubuntu-latest, 3.x)	2m 10s
Python Tests (ubuntu-latest, 3.12-dev)	2m 44s
Python Tests (windows-latest, 3.8)	5m 18s
Python Tests (windows-latest, 3.x)	5m 9s
Python Tests (windows-latest, 3.12-dev)	6m 41s
Tests (ubuntu-latest, 3.x, ts-unit)	2m 48s
Tests (ubuntu-latest, 3.x, venv)	3m 17s
Tests (ubuntu-latest, 3.x, single-workspace)	3m 5s
Tests (ubuntu-latest, 3.x, debugger)	2m 22s
Tests (ubuntu-latest, 3.x, functional)	2m 13s
Tests (windows-latest, 3.x, ts-unit)	5m 21s
Tests (windows-latest, 3.x, venv)	6m 56s
Tests (windows-latest, 3.x, single-workspace)	6m 22s
Tests (windows-latest, 3.x, debugger)	6m 39s
Tests (windows-latest, 3.x, functional)	4m 54s
Smoke tests (ubuntu-latest)	2m 30s
Smoke tests (windows-latest)	6m 54s
	1h 39m 3s

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