[ci] add nonamedreturns linter #1384

	# Run unit tests.
	# Start for pull requests and on push to default branch.
	name: Unit tests
	on:
	pull_request:
	types: [opened, synchronize]
	jobs:
	run_unit_tests:
	name: Run unit tests
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go 1.22
	uses: actions/setup-go@v5
	with:
	go-version: "1.22"

	- name: Check out shell-operator code
	uses: actions/checkout@v4

	- name: Restore Go modules
	id: go-modules-cache
	uses: actions/[email protected]
	with:
	path: \|
	~/go/pkg/mod
	key: ${{ runner.os }}-gomod-${{ hashFiles('go.mod', 'go.sum') }}
	restore-keys: \|
	${{ runner.os }}-gomod-

	- name: Download Go modules
	if: steps.go-modules-cache.outputs.cache-hit != 'true'
	run: \|
	go mod download
	echo -n "Go modules unpacked size is: " && du -sh $HOME/go/pkg/mod

	- name: Download prebuilt libjq static libraries
	run: \|
	curl -sSfL https://github.com/flant/libjq-go/releases/download/jq-b6be13d5-0/libjq-glibc-amd64.tgz \| tar zxf -

	- name: Run unit tests
	run: \|
	export CGO_ENABLED=1
	export CGO_CFLAGS="-I$GITHUB_WORKSPACE/libjq/include"
	export CGO_LDFLAGS="-L$GITHUB_WORKSPACE/libjq/lib"
	export GOOS=linux

	go test \
	-tags test \
	./cmd/... ./pkg/... ./test/utils

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