pinboard: Add story filters to job configs

Story filters are now required for pinpoint job configs as of
https://chromium.googlesource.com/catapult.git/+/41a6191ed80e747e0924c4f9286597f84492b530

Change-Id: I5f3ec92bd6f335ff683dcd002cc90487fce0bfdb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2112468
Commit-Queue: Sami Kyöstilä <skyostil@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Auto-Submit: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752003}

tools/perf/cli_tools/pinboard/job_configs.json

@@ -4,7 +4,7 @@
     "target": "performance_test_suite",
     "configuration": "android-go-perf",
     "benchmark": "v8.browsing_mobile",
-    "extra_test_args": "--story-tag-filter emerging_market",
+    "story_tags": "emerging_market",
     "patch": "https://chromium-review.googlesource.com/c/v8/v8/+/1784285",
     "repository": "chromium"
   },
@@ -13,6 +13,7 @@
     "target": "performance_test_suite",
     "configuration": "android-go-perf",
     "benchmark": "speedometer2",
+    "story": "Speedometer2",
     "patch": "https://chromium-review.googlesource.com/c/v8/v8/+/1784285",
     "repository": "chromium"
   }