ci: use cache for based on the go.sum for dependencies for faster GH action execution #1599

	# skip-unit-tests.yml runs when unit-tests.yml is skipped
	name: Unit Tests

	on:
	pull_request:
	# paths-ignore makes the action run when the given paths are unchanged
	# See "Handling skipped but required checks" in
	# https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/defining-the-mergeability-of-pull-requests/troubleshooting-required-status-checks#handling-skipped-but-required-checks
	paths-ignore: [".go", ".proto", "go.mod", "go.sum"]

	jobs:
	unit-tests:
	runs-on: ubuntu-latest
	steps:
	- name: skip-tests
	run: \|
	echo "job: unit-tests was skipped since Golang files were not changed."

	build:
	runs-on: ubuntu-latest
	steps:
	- name: skip-build
	run: \|
	echo "job: build was skipped since Golang files were not changed."

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