update workflows: enhance Codecov integration #61

Job	Run time
ci-matrix (macos-latest) / lint-test / lint-and-test	26s
ci-matrix (ubuntu-latest) / lint-test / lint-and-test	30s
ci-matrix (macos-latest) / validation	0s
ci-matrix (macos-latest) / device-tests	0s
ci-matrix (macos-latest) / build	0s
ci-matrix (ubuntu-latest) / build	0s
ci-matrix (ubuntu-latest) / device-tests	0s
ci-matrix (ubuntu-latest) / validation	0s
	56s

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