Implement rust repeated scalars for cpp and upb

PiperOrigin-RevId: 574261929
diff --git a/WORKSPACE b/WORKSPACE
index 2c665be..d0d66ec 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -193,6 +193,9 @@
         "googletest": crate.spec(
             version = ">0.0.0",
         ),
+        "paste": crate.spec(
+          version = ">=1",
+        ),
     },
 )