Disabled cc_poster_circle from rep perf test

Currently map fyi bots which run rendering_representative_perf_tests fail as a result of:

DevtoolsTargetCrashException: Devtools target crashed
(/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_backend.py:539 _AddDebuggingInformation) Received a socket error in the browser connection and the tab no longer exists. The tab probably crashed.

While investigating this issue, this test can be disabled.
TBR=kbr@chromium.org

Bug: chromium:968119
Change-Id: I71fbb8f3e296203a9b556544ce2a8fc6345a9566
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1634385
Commit-Queue: Behdad Bakhshinategh <behdadb@chromium.org>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664305}

testing/scripts/representative_perf_test_data/representatives_frame_times_upper_limit.json

@@ -114,10 +114,6 @@
       "avg": 84.24052,
       "ci_095": 34.49607228
     },
-    "cc_poster_circle": {
-      "avg": 75.5703894,
-      "ci_095": 15.79465651
-    },
     "infinite_scroll_root_fixed_n_layers_99": {
       "avg": 53.85195,
       "ci_095": 13.26379689