Fix system-probe on Talos Linux

[tbavelier]

What this PR does / why we need it:

• Do not mount kernel headers directories from Talos nodes, as it uses some read-only mounts, preventing the DS from being scheduled since the volume can't be created on the host
  • system-probe should use instead debugfs (if available on the node) or mount tracefs manually
  • Moreover, we have btf files present on Talos Linux nodes, so we can use the default CO-RE instead of relying on runtime compilation

╰─❯ talosctl -n 10.1.10.253 ls /sys/kernel/btf
NODE          NAME
10.1.10.253   .
10.1.10.253   ena
10.1.10.253   nvme
10.1.10.253   vmlinux

Special notes for your reviewer:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Chart Version semver bump label added (use <chartName>/minor-version, <chartName>/patch-version, or <chartName>/no-version-bump)
• For datadog or datadog-operator chart or value changes, update the test baselines (run: make update-test-baselines)

GitHub CI takes care of the below, but are still required:

• Documentation has been updated with helm-docs (run: .github/helm-docs.sh)
• CHANGELOG.md has been updated
• Variables are documented in the README.md

[tbavelier]

/merge

[dd-devflow-routing-codex]

View all feedbacks in Devflow UI.

2025-10-24 13:28:16 UTC ℹ️ Start processing command /merge

---

2025-10-24 13:28:22 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in main is approximately 60m (p90).

---

2025-10-24 14:16:14 UTC 🚨 MergeQueue: This merge request is in error

mergequeue build completed successfully, but the github api returned an error while merging the pr.
It's probably because:

• some status checks are failing:
  • dd-gitlab/e2e: [e2e_autopilot, 7-rc]
• target branch of PR is restricted to only allow up-to-date branches, but the pr is now outdated

Details

Error: PUT https://api.github.com/repos/DataDog/helm-charts/pulls/2105/merge: 405 Required status check "pr-validated" is expected. [] (Request ID: 885A:10E02B:BE8DC8:32E62F0:68FB8A25)

FullStacktrace:
activity error (type: github.GithubService_MergePullRequest, scheduledEventID: 41, startedEventID: 42, identity: 1@github-worker-79df4f7b67-nqsh5@): PUT https://api.github.com/repos/DataDog/helm-charts/pulls/2105/merge: 405 Required status check "pr-validated" is expected. [] (Request ID: 885A:10E02B:BE8DC8:32E62F0:68FB8A25) (type: GitFailure, retryable: false): PUT https://api.github.com/repos/DataDog/helm-charts/pulls/2105/merge: 405 Required status check "pr-validated" is expected. [] (type: ErrorResponse, retryable: true)