feat(ioscompanion): embed and extract the runner test bundle

internal/driver/ioscompanion/runnerassets/embed_real.go

@@ -0,0 +1,12 @@
+//go:build withcompanion
+
+package runnerassets
+
+import _ "embed"
+
+//go:embed assets/runner-1.0.0.tar.gz
+var embeddedArchive []byte
+
+// IsPlaceholder reports whether the binary was built without the real runner
+// archive embedded. -tags withcompanion builds always return false.
+func IsPlaceholder() bool { return false }