Legacy-testing: add support for POST #5399

Job	Run time
Prepare	1m 5s
Shellcheck	3s
Dependency	5s
Ruff check and force	15s
Check commit	37s
Create pytest cache for Python 3.13.0	18s
Create pytest cache for Python 3.12	5s
Run pytest using Python 3.13.0	26s
Run pytest using Python 3.12	15s
Process test coverage	18s
Run mypy	19s
Process test complexity	14s
Build and publish Python 🐍 distributions 📦 to TestPyPI	28s
	4m 28s

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