Add amneziawg cable driver to using= flags

[sanek9]

Summary

• Map using=amneziawg to CABLE_DRIVER=amneziawg in Makefile.inc so Shipyard deploy/E2E can select the AmneziaWG cable driver.
• AmneziaWG is userspace (embedded amneziawg-go); no host kernel module install is required (unlike WireGuard).

Context

Companion to submariner-io/submariner#4097, which adds amneziawg to the Submariner CI E2E / flake-finder cable-driver matrix. Those jobs use shipyard/gh-actions/e2e@devel, so this change needs to land on Shipyard devel for the matrix entries to select AmneziaWG correctly (otherwise CABLE_DRIVER stays at the libreswan default).

Test plan

• make deploy using=amneziawg (or E2E) sets CABLE_DRIVER=amneziawg / passes --cable-driver amneziawg to subctl
• WireGuard path unchanged (using=wireguard still installs modules and sets CABLE_DRIVER=wireguard)

Made with Cursor

Summary by CodeRabbit

• New Features
  • Added support for selecting the AmneziaWG userspace driver through the build configuration.
  • AmneziaWG can run without requiring a host kernel module.

[submariner-bot]

🤖 Created branch: z_pr2492/sanek9/feat/amneziawg-cable-driver

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: bea7c1ac-07a8-442a-ab11-905f86ba4dc5

📥 Commits

Reviewing files that changed from the base of the PR and between f93811d and 6536b35.

📒 Files selected for processing (1)

• Makefile.inc

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Walkthrough

The Makefile using option parser now recognizes amneziawg, selects it as the cable driver, and documents that it uses embedded userspace amneziawg-go without requiring a host kernel module.

Changes

AmneziaWG driver selection

Layer / File(s)	Summary
AmneziaWG cable driver parsing Makefile.inc	The using option parser recognizes amneziawg, sets CABLE_DRIVER accordingly, and documents its userspace implementation.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: mkolesnik, skitt, sridhargaddam

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: adding amneziawg support to the using= flag parsing.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Actionable Comments Resolved	✅ Passed	PR #2492 shows only author/bot conversation and no review comments or changes requested, so there are no unresolved actionable comments.

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