fix(edgedelta): use native Makeself extraction instead of fragile shell-carving

[edge-delta]

Summary

This PR replaces the fragile manual carving of the Makeself archive payload in packages/edgedelta/build.sh with the installer's native --target payload --noexec extraction mechanism.

Related issues

Ref: #295

Changes

• Replaced fragile grep, head, and tail byte offset calculation in packages/edgedelta/build.sh with sh "$installer" --target payload --noexec.

Checklist

• I've read CONTRIBUTING.md.
• I've accepted the ICLA (and CCLA if contributing on my employer's time). CLA Assistant will prompt me on this PR if I haven't already.
• min check passes for the affected packages/harnesses.
• min patched-build <name> succeeds for any package I added or modified.
• For new packages: source_provenance points to the canonical upstream and the source builds from source (not a prebuilt release binary) where the required toolchain is available.
• For version bumps: I've verified the new sha256 against the upstream archive.

Notes for reviewers

The native --target payload --noexec options are standard across Makeself installers, making extraction highly robust against upstream changes to the header layout or tool environment differences.

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This pull/merge request was created by Edge Delta AI Teammates — see #code-issues for the original conversation.

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[bryan-minimal]

Thanks so much for this, and for digging into our packaging — the hand-rolled Makeself byte-carving in the edgedelta package is genuinely fragile; the installer's native --target payload --noexec is the right call. 🙏

We're closing this in favour of small, focused internal fixes: we've distilled it, along with your other PRs, into #353, which tracks the underlying findings as actionable items. This PR bundled a number of unrelated package changes and overlapped with others, and we keep changes small and focused per CONTRIBUTING — but the insight is captured and we'll land the fix on our side.

Genuinely grateful for the contribution — please don't let this discourage smaller, focused follow-ups. 🙏