test: Make Arrow C++ dependency optional #1528

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	name: coverage

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	paths:
	- '.github/workflows/coverage.yaml'
	- 'ci/scripts/coverage.sh'
	- 'ci/docker/ubuntu.dockerfile'
	- 'docker-compose.yml'
	- 'CMakeLists.txt'
	- 'src/nanoarrow/**'
	- 'r/**'

	jobs:
	coverage:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Calculate code coverage
	run: \|
	echo "::group::Docker Pull"
	docker compose run --rm -e GITHUB_ACTIONS coverage

	- name: Upload coverage artifacts
	if: always()
	uses: actions/upload-artifact@main
	with:
	name: nanarrow-coverage
	path: _coverage

	- name: Upload coverage to codecov
	uses: codecov/codecov-action@v3
	with:
	files: '_coverage/coverage.info,_coverage/r_coverage.json,_coverage/python_coverage.xml'

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