feat: add disk exporter module and related configurations

- Introduced a new disk exporter module to monitor disk health using SMART data.
- Updated `apps.tf` to include the disk exporter module with necessary parameters.
- Added local variables for smartctl version and checksum in `config.tf`.
- Enhanced `alertmanager.yml` to handle DiskUnhealthy alerts with specific grouping and dispatch settings.
- Created new Prometheus rules for monitoring disk health, including alerts for unhealthy disks.
- Updated Prometheus configuration to scrape metrics from the new disk exporter.
- Enhanced Telegram notification template to include resolved alerts and improved formatting.
- Updated the auth-exporter module to specify the Python image tag correctly.
- Created the disk-exporter module with Kubernetes resources, including deployment, service account, and config map.
- Added necessary Python scripts and requirements for the disk exporter functionality.

terraform/modules/utils/disk-exporter/config.tf

@@ -0,0 +1,15 @@
+locals {
+  app_version = var.tag
+  workdir     = "${var.persistent_folder}/disk-exporter"
+  commands = [
+    "python -m venv /tmp/venv",
+    ". /tmp/venv/bin/activate",
+    "pip install -r /exporter/requirements.txt",
+    "python /exporter/exporter.py --export-usernames"
+  ]
+  exporter_script  = file("${path.module}/resources/exporter.py")
+  requirements_txt = file("${path.module}/resources/requirements.txt")
+
+  exporter_checksum     = md5(local.exporter_script)
+  requirements_checksum = md5(local.requirements_txt)
+}