[test] Add configs for optional linux trybot

This optional trybot runs all tests not run by the CQ bot, but run by
the CI release or debug bot.

TBR=sergiyb@chromium.org
NOTRY=true

Bug: v8:7285
Change-Id: Ifda294448ba92b8055a633ef1e26b4045a38f718
Reviewed-on: https://chromium-review.googlesource.com/1207852
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55676}

infra/mb/mb_config.pyl

@@ -209,6 +209,7 @@
       'v8_android_arm64_n5x_rel_ng': 'release_android_arm64',
       'v8_fuchsia_rel_ng': 'release_x64_fuchsia_trybot',
       'v8_linux_rel_ng': 'release_x86_gcmole_trybot',
+      'v8_linux_optional_rel_ng': 'release_x86_trybot',
       'v8_linux_verify_csa_rel_ng': 'release_x86_verify_csa',
       'v8_linux_nodcheck_rel_ng': 'release_x86_minimal_symbols',
       'v8_linux_dbg_ng': 'debug_x86_trybot',

infra/testing/builders.pyl

@@ -125,6 +125,61 @@
       {'name': 'v8testing', 'variant': 'extra'},
     ],
   },
+  'v8_linux_optional_rel_ng_triggered': {
+    'swarming_dimensions' : {
+      'cpu': 'x86-64-avx2',
+    },
+    'tests': [
+      # Code serializer.
+      {'name': 'benchmarks', 'variant': 'code_serializer', 'shards': 1},
+      {'name': 'd8testing', 'variant': 'code_serializer', 'shards': 1},
+      {'name': 'mozilla', 'variant': 'code_serializer', 'shards': 1},
+      {'name': 'test262_variants', 'variant': 'code_serializer', 'shards': 1},
+      # No SSE3.
+      {
+        'name': 'mozilla',
+        'suffix': 'nosse3',
+        'test_args': [
+          '--extra-flags',
+          '--noenable-sse3 --noenable-ssse3 --noenable-sse4-1 --noenable-avx',
+        ],
+      },
+      {
+        'name': 'test262',
+        'suffix': 'nosse3',
+        'test_args': [
+          '--extra-flags',
+          '--noenable-sse3 --noenable-ssse3 --noenable-sse4-1 --noenable-avx',
+        ],
+      },
+      {
+        'name': 'v8testing',
+        'suffix': 'nosse3',
+        'test_args': [
+          '--extra-flags',
+          '--noenable-sse3 --noenable-ssse3 --noenable-sse4-1 --noenable-avx',
+        ],
+        'shards': 3,
+      },
+      # No SSE4.
+      {
+        'name': 'mozilla',
+        'suffix': 'nosse4',
+        'test_args': ['--extra-flags', '--noenable-sse4-1 --noenable-avx'],
+      },
+      {
+        'name': 'test262',
+        'suffix': 'nosse4',
+        'test_args': ['--extra-flags', '--noenable-sse4-1 --noenable-avx'],
+      },
+      {
+        'name': 'v8testing',
+        'suffix': 'nosse4',
+        'test_args': ['--extra-flags', '--noenable-sse4-1 --noenable-avx'],
+        'shards': 3,
+      },
+    ],
+  },
   'v8_linux_verify_csa_rel_ng_triggered': {
     'tests': [
       {'name': 'v8testing'},