Add devcontainer-lock.json with Renovate update support (#39046)

.devcontainer/devcontainer-lock.json

@@ -0,0 +1,9 @@
+{
+  "features": {
+    "ghcr.io/devcontainers/features/sshd:1": {
+      "version": "1.1.0",
+      "resolved": "ghcr.io/devcontainers/features/sshd@sha256:f5251b8e4325f68f7280973c6cd65daff414449c66f240621502d4e8e74eb7ee",
+      "integrity": "sha256:f5251b8e4325f68f7280973c6cd65daff414449c66f240621502d4e8e74eb7ee"
+    }
+  }
+}