[js-perf-test] Add microbenchmarks for materialized rest parameters.

test/js-perf-test/JSTests.json

 {
   "name": "JSTests",
   "run_count": 3,
   "run_count_arm": 1,
   "run_count_arm64": 1,
   "timeout": 120,
   "units": "score",
   "total": true,
   "resources": ["base.js"],
   "tests": [
@@ skipping 47 matching lines @@
       "results_regexp": "^Generators\\-Generators\\(Score\\): (.+)$"
     },
     {
       "name": "RestParameters",
       "path": ["RestParameters"],
       "main": "run.js",
       "resources": ["rest.js"],
       "units": "score",
       "results_regexp": "^%s\\-RestParameters\\(Score\\): (.+)$",
       "tests": [
-        {"name": "Basic1"}
+        {"name": "Basic1"},
+        {"name": "ReturnArgsBabel"},
+        {"name": "ReturnArgsNative"}
       ]
     },
     {
       "name": "SpreadCalls",
       "path": ["SpreadCalls"],
       "main": "run.js",
       "resources": ["spreadcalls.js"],
       "units": "score",
       "results_regexp": "^%s\\-SpreadCalls\\(Score\\): (.+)$",
       "tests": [
@@ skipping 312 matching lines @@
         "for_loop.js"
       ],
       "results_regexp": "^%s\\-ForLoop\\(Score\\): (.+)$",
       "tests": [
         {"name": "Let-Standard"},
         {"name": "Var-Standard"}
       ]
     }
   ]
 }