fix(fasterdata): clearer IOMMU audit message + v1.1.3 + site sync + CI verification

[ShawnMcKee]

fix(fasterdata): clearer IOMMU audit message + v1.1.3 + site sync + CI verification

Summary:

• Update the fasterdata-tuning.sh GRUB audit message to recommend the correct GRUB regeneration command depending on the system: prefer grubby (EL9/BLS) or fall back to grub2-mkconfig / update-grub.
• Bump fasterdata-tuning.sh version to 1.1.3 and sync the script and docs into the site/ copy; update checksums for the updated script.
• Add a changelog entry under docs/perfsonar/tools_scripts/CHANGELOG.md for 1.1.3.
• Add CI verification to ensure docs -> site script copies remain in sync and that the .sha256 values match the computed script checksum.
• Add an autoupdate helper and workflow job to auto-update *.sha256 and scripts.sha256 for changed script files in a PR.

Files changed (high level):

• docs/perfsonar/tools_scripts/fasterdata-tuning.sh — audit message clarification, version bump to 1.1.3, and small doc updates.
• docs/perfsonar/tools_scripts/fasterdata-tuning.md — clarify --apply-iommu behavior and remove duplicate bullet.
• site/perfsonar/tools_scripts/* — synced site copies for script & docs and updated SHA files.
• docs/perfsonar/tools_scripts/CHANGELOG.md — added a changelog entry for 1.1.3.
• .github/scripts/verify-site-scripts.sh — updated to allow checking only changed script files in PRs.
• .github/scripts/autoupdate-scripts-sha.sh — new helper that updates per-script .sha256 and scripts.sha256 for changed script files and commits the change.
• .github/workflows/verify-site-scripts.yml — CI job to run verification on PRs and master pushes.

Testing performed:

• Verified bash -n for the updated fasterdata-tuning.sh returned no syntax errors.
• Verified the computed SHA is correct for fasterdata-tuning.sh and this is reflected in the .sha256 files in docs & site.
• Ran the verify script locally with a file list to confirm changed-only checks work and display mismatches for other scripts.
• Validated the autoupdate helper updates *.sha256 for changed files (commits the update back to the branch).

Review checklist & notes for reviewers:

• Verify audit message clarity: The PR should show grubby for EL9/BLS systems and grub2-mkconfig or update-grub for legacy systems.
• Verify the --apply-iommu documentation in fasterdata-tuning.md and the doc example for --iommu-args are correct.
• Confirm PR CI workflow is reasonable: it should only check changed scripts to avoid noise; it blocks PR merges when a changed script differs between docs/site or its SHA doesn’t match.
• Check the autoupdate-scripts-sha.sh behavior to ensure it updates the sha files and scripts.sha256 and commits them to the PR branch (GITHUB_TOKEN used for permission).

Followups (optional):

• Expand CI to optionally auto-fix or propose a commit for mismatched site copies if docs changes script content (i.e., update site copy rather than failing the build).
• Add a pre-commit hook or git template to warn authors about updating fasterdata script files and not updating *.sha256 or site copies.