test(disks): add disk filesystem metrics tests and helper functions #1

	name: disk-fs-integration

	on:
	workflow_dispatch:
	pull_request:
	branches:
	- main
	- develop
	paths:
	# Only run this workflow when files related to the disk filesystem integration tests are changed
	- .github/workflows/disk-fs-integration.yml
	- internal/metric/disk.go
	- test/integration/disk_fs_test.go
	- test/integration/disk_env.go
	- test/helpers.go
	- go.mod
	- go.sum

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	permissions:
	contents: read

	jobs:
	disk-fs-test:
	name: Disk FS integration (root)
	runs-on: ubuntu-22.04
	timeout-minutes: 20

	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	persist-credentials: false

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version-file: go.mod

	- name: Install filesystem tools
	run: \|
	sudo apt-get update
	sudo apt install -y \
	e2fsprogs \
	xfsprogs \
	btrfs-progs \
	zfsutils-linux \
	lvm2

	- name: Prepare kernel modules and loop devices
	run: \|
	sudo modprobe loop \|\| true

	- name: Run disk filesystem integration test as root
	run: \|
	GO_BIN="$(command -v go)"
	echo "Using Go binary: ${GO_BIN}"
	sudo "${GO_BIN}" test -v -count=1 -run TestDiskFilesystemMetrics ./test/integration/

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