fix bug with unittest debug not having args #8084

Job	Run time
Check Python types	2m 1s
Create VSIX	2m 35s
Coverage (ubuntu-latest)	11m 58s
Lint	2m 29s
Python Tests (ubuntu-latest, 3.8)	2m 10s
Python Tests (ubuntu-latest, 3.x)	2m 10s
Python Tests (ubuntu-latest, 3.12-dev)	3m 6s
Python Tests (windows-latest, 3.8)	5m 9s
Python Tests (windows-latest, 3.x)	4m 48s
Python Tests (windows-latest, 3.12-dev)	8m 21s
Tests (ubuntu-latest, 3.x, ts-unit)	3m 3s
Tests (ubuntu-latest, 3.x, venv)	4m 2s
Tests (ubuntu-latest, 3.x, single-workspace)	3m 6s
Tests (ubuntu-latest, 3.x, debugger)	2m 41s
Tests (ubuntu-latest, 3.x, functional)	2m 10s
Tests (windows-latest, 3.x, ts-unit)	5m 28s
Tests (windows-latest, 3.x, venv)	6m 22s
Tests (windows-latest, 3.x, single-workspace)	6m 59s
Tests (windows-latest, 3.x, debugger)	5m 44s
Tests (windows-latest, 3.x, functional)	5m 0s
Smoke tests (ubuntu-latest)	2m 44s
Smoke tests (windows-latest)	7m 50s
	1h 39m 56s

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