Bump external/ebpf-verifier from `ade89f7` to `d259d31` (#1269)

Bumps [external/ebpf-verifier](https://github.com/vbpf/ebpf-verifier) from `ade89f7` to `d259d31`.
- [Release notes](https://github.com/vbpf/ebpf-verifier/releases)
- [Commits](ade89f7a69...d259d31c43)

---
updated-dependencies:
- dependency-name: external/ebpf-verifier
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Alan Jowett <alanjo@microsoft.com>

external/ebpf-verifier

@@ -1 +1 @@
-Subproject commit 4dacdc225f730f16d353a5f4ab0536e1ca047e12
+Subproject commit d259d31c438646b6136be588acba7fefae4fc716