Update codecov/codecov-action action to v7 (#882) #6218

Job	Run time
Shellcheck	5s
Dependency	6s
Cache identify	7s
Prepare	10s
Ruff check and force	11s
Check commit	24s
Run pytest using Python 3.14	17s
Run pytest using Python 3.13	16s
Run mypy	12s
Process test coverage	10s
Process test complexity	10s
Build and publish Python 🐍 distributions 📦 to TestPyPI	9s
	2m 17s

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