Disable parallelization on telemetry_unittests & set the number of shards to 2 (linux)

testing/buildbot/chromium.fyi.json

Index: testing/buildbot/chromium.fyi.json
diff --git a/testing/buildbot/chromium.fyi.json b/testing/buildbot/chromium.fyi.json
index c4b23615635728265f05cf676e7dd06981780937..fdc05b9d2537e989e1fde9cb32e647719db5fc0f 100644
--- a/testing/buildbot/chromium.fyi.json
+++ b/testing/buildbot/chromium.fyi.json
@@ -10562,13 +10562,17 @@
         }
       },
       {
+        "args": [
+          "--jobs=1"
+        ],
         "isolate_name": "telemetry_unittests",
         "name": "telemetry_unittests",
         "override_compile_targets": [
           "telemetry_unittests_run"
         ],
         "swarming": {
-          "can_use_on_swarming_builders": true
+          "can_use_on_swarming_builders": true,
+          "shards": 2
         }
       }
     ],
@@ -11127,13 +11131,17 @@
         }
       },
       {
+        "args": [
+          "--jobs=1"
+        ],
         "isolate_name": "telemetry_unittests",
         "name": "telemetry_unittests",
         "override_compile_targets": [
           "telemetry_unittests_run"
         ],
         "swarming": {
-          "can_use_on_swarming_builders": true
+          "can_use_on_swarming_builders": true,
+          "shards": 2
         }
       }
     ],