ENH: Add an output parameter for ``coverage``

[ganesh-k13]

ENH: Add an output parameter for coverage

Today spin test --coverage hardcodes the output to HTML in a default location:

spin/spin/cmds/meson.py

Lines 622 to 626 in 1713846

	pytest_args = [
	*pytest_args,
	"--cov-report=term",
	f"--cov-report=html:{coverage_dir}",
	f"--cov={package}",

Proposal

Enhance the coverage flag to take <format>:<location> as input. So some of the options will look like:

spin test --coverage # Default behavior for backward compatibility
spin test --coverage xml # Only format, default output to `{coverage_dir}`
spin test --coverage xml:/var/tmp/cov.xml # Format+location

This will mainly help in CI builds to upload artifacts

[ganesh-k13]

As per numpy/numpy#30911 (comment), we can introduce a new coverage command as well (cc: @mattip)

Both looks good to me, I can implement based on what everyone thinks: 1. make --coverage an extended param of spin test or 2. Introduce spin coverage

[ngoldbaum]

I like the idea of a spin coverage command that wraps spin test.