V8: Switch ignition test steps to the standard suite alias

scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64_TSAN.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "client.v8",
       "--builder",
       "V8 Linux64 TSAN",
@@ skipping 318 matching lines @@
       "-u",
       "RECIPE_MODULE[build::isolate]/resources/isolate.py",
       "[SLAVE_BUILD]/v8/tools/swarming_client",
       "batcharchive",
       "--dump-json",
       "/path/to/tmp/json",
       "--isolate-server",
       "https://isolateserver.appspot.com",
       "--verbose",
       "[SLAVE_BUILD]/v8/out/Release/bot_default.isolated.gen.json",
-      "[SLAVE_BUILD]/v8/out/Release/ignition.isolated.gen.json",
       "[SLAVE_BUILD]/v8/out/Release/test262.isolated.gen.json"
     ],
     "name": "isolate tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"bot_default\": \"[dummy hash for bot_default]\", @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"ignition\": \"[dummy hash for ignition]\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"test262\": \"[dummy hash for test262]\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/v8/tools/swarming_client/swarming.py",
@@ skipping 55 matching lines @@
       "--",
       "--progress=verbose",
       "--mode",
       "Release",
       "--arch",
       "x64",
       "--outdir",
       "out",
       "--buildbot",
       "--timeout=200",
-      "--random-seed=1950386076",
+      "--random-seed=831298184",
       "bot_default",
       "--exhaustive-variants",
       "--tsan",
       "--rerun-failures-count=2",
       "--swarming",
       "--json-test-results",
       "${ISOLATED_OUTDIR}/output.json"
     ],
     "name": "[trigger] Check on Ubuntu-14.04",
     "~followup_annotations": [
@@ skipping 86 matching lines @@
       "--",
       "--progress=verbose",
       "--mode",
       "Release",
       "--arch",
       "x64",
       "--outdir",
       "out",
       "--buildbot",
       "--timeout=200",
-      "--random-seed=1950386076",
+      "--random-seed=831298184",
       "bot_default",
       "--variants=extra",
       "--tsan",
       "--rerun-failures-count=2",
       "--swarming",
       "--json-test-results",
       "${ISOLATED_OUTDIR}/output.json"
     ],
     "name": "[trigger] Check - extra on Ubuntu-14.04",
     "~followup_annotations": [
@@ skipping 80 matching lines @@
       "--",
       "--progress=verbose",
       "--mode",
       "Release",
       "--arch",
       "x64",
       "--outdir",
       "out",
       "--buildbot",
       "--timeout=200",
-      "--random-seed=1950386076",
+      "--random-seed=831298184",
       "test262",
       "--download-data",
       "--variants=default",
       "--tsan",
       "--rerun-failures-count=2",
       "--swarming",
       "--json-test-results",
       "${ISOLATED_OUTDIR}/output.json"
     ],
     "name": "[trigger] Test262 - no variants on Ubuntu-14.04",
@@ skipping 52 matching lines @@
       "os",
       "Ubuntu-14.04",
       "--dimension",
       "pool",
       "Chrome",
       "--tag",
       "buildername:V8 Linux64 TSAN",
       "--tag",
       "buildnumber:571",
       "--tag",
-      "data:[dummy hash for ignition]",
+      "data:[dummy hash for bot_default]",
       "--tag",
       "master:client.v8",
       "--tag",
       "name:Ignition",
       "--tag",
       "os:Ubuntu-14.04",
       "--tag",
       "project:v8",
       "--tag",
       "purpose:CI",
       "--tag",
       "purpose:post-commit",
       "--tag",
       "slavename:TestSlavename",
       "--tag",
       "stepname:Ignition - turbofan on Ubuntu-14.04",
       "--idempotent",
-      "[dummy hash for ignition]",
+      "[dummy hash for bot_default]",
       "--",
       "--progress=verbose",
       "--mode",
       "Release",
       "--arch",
       "x64",
       "--outdir",
       "out",
       "--buildbot",
       "--timeout=200",
-      "--random-seed=1950386076",
-      "ignition",
+      "--random-seed=831298184",
+      "bot_default",
       "--ignition-turbofan",
       "--variants=ignition_turbofan",
       "--tsan",
       "--rerun-failures-count=2",
       "--swarming",
       "--json-test-results",
       "${ISOLATED_OUTDIR}/output.json"
     ],
     "name": "[trigger] Ignition - turbofan on Ubuntu-14.04",
     "~followup_annotations": [
@@ skipping 166 matching lines @@
       "@@@STEP_LOG_LINE@durations@Duration: 00:00:101@@@",
       "@@@STEP_LOG_END@durations@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]