[25.12] tailscale: update to 1.94.2

[SuperSandro2000]

Changelog: https://tailscale.com/changelog#2026-01-26

I could not cherry-pick #28654 since the merged commit is somehow a merge commit with many, many changes.

📦 Package Details

Maintainer: me / @mochaaP

Description: update tailscale to 1.94.2

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🧪 Run Testing Details

None, I have no device with apk but I build it and I think it should work.

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✅ Formalities

• I have reviewed the CONTRIBUTING.md file for detailed contributing guidelines.

If your PR contains a patch:

• It can be applied using git am
• It has been refreshed to avoid offsets, fuzzes, etc., using

  make package/<your-package>/refresh V=s

• It is structured in a way that it is potentially upstreamable
  _{(e.g., subject line, commit description, etc.)
  We must try to upstream patches to reduce maintenance burden.}