fixup! vendor shamir's secret sharing from hashicorp

Signed-off-by: Daniel Weiße <[email protected]>

Author: daniel-weisse

.github/workflows/check-license.yml

@@ -21,4 +21,4 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Check for files without license header
-        run: "! grep -rL --include='*.go' -e'Copyright (c) Edgeless Systems GmbH' -e'DO NOT EDIT' | grep ''"
+        run: "! grep -rL --include='*.go' --exclude-dir='3rdparty' -e'Copyright (c) Edgeless Systems GmbH' -e'DO NOT EDIT' | grep ''"