agent does not report inodes usage

**Describe the bug**

ops-agent seems to not collect the `system.filesystem.inodes.usage` metric.

**To Reproduce**
Steps to reproduce the behavior:
1. Run a GCE VM with Ops Agent `--version=2.48.0` and default config.
2. Wait for metrics to show up in Cloud Monitoring.
3. See that there are metrics for disk usage, but NOT inodes usage

**Expected behavior**
Inodes usage should be collected and available in Cloud Monitoring.

**Environment (please complete the following information):**
- VM distro / OS: Ubuntu 24.04
- Ops Agent version: 2.48.0
- Ops Agent configuration: default

**Additional context**
It seems like the metric is explicitly filtered out in the ops-agent (see https://github.com/GoogleCloudPlatform/ops-agent/blob/1246ead5754c075662cb97b6c118f08e9929a7bb/apps/hostmetrics.go#L325). Is there any reason for this? Can this be overridden with a custom config?