[infra] split heap sandbox builders to builder tester pairs

Bug: v8:11694
Change-Id: I52e21a07b3a90d43d321fe9d680b129eb8f9aca7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2866770
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74327}

infra/mb/mb_config.pyl

@@ -65,7 +65,7 @@
       'V8 Linux64 - debug builder': 'debug_x64',
       'V8 Linux64 - dict tracking - debug - builder': 'debug_x64_dict_tracking_trybot',
       'V8 Linux64 - custom snapshot - debug builder': 'debug_x64_custom',
-      'V8 Linux64 - heap sandbox - debug': 'debug_x64_heap_sandbox',
+      'V8 Linux64 - heap sandbox - debug - builder': 'debug_x64_heap_sandbox',
       'V8 Linux64 - internal snapshot': 'release_x64_internal',
       'V8 Linux64 - debug - header includes': 'debug_x64_header_includes',
       'V8 Linux64 - shared': 'release_x64_shared_verify_heap',
@@ -216,7 +216,7 @@
       'v8_linux64_gcc_compile_dbg': 'debug_x64_gcc',
       'v8_linux64_gcov_coverage': 'release_x64_gcc_coverage',
       'v8_linux64_header_includes_dbg': 'debug_x64_header_includes',
-      'v8_linux64_heap_sandbox_compile_dbg': 'debug_x64_heap_sandbox',
+      'v8_linux64_heap_sandbox_dbg_ng': 'debug_x64_heap_sandbox',
       'v8_linux64_fyi_rel_ng': 'release_x64_test_features_trybot',
       'v8_linux64_nodcheck_rel_ng': 'release_x64',
       'v8_linux64_perfetto_dbg_ng': 'debug_x64_perfetto',

infra/testing/builders.pyl

@@ -413,6 +413,14 @@
       {'name': 'v8testing'},
     ],
   },
+  'v8_linux64_heap_sandbox_dbg_ng_triggered': {
+    'swarming_dimensions' : {
+      'os': 'Ubuntu-18.04',
+    },
+    'tests': [
+      {'name': 'v8testing', 'shards': 2},
+    ],
+  },
   'v8_linux64_msan_rel_ng_triggered': {
     'swarming_dimensions' : {
       'os': 'Ubuntu-18.04',
@@ -1251,6 +1259,14 @@
       {'name': 'v8testing'},
     ],
   },
+  'V8 Linux64 - heap sandbox - debug': {
+    'swarming_dimensions' : {
+      'os': 'Ubuntu-18.04',
+    },
+    'tests': [
+      {'name': 'v8testing', 'shards': 2},
+    ],
+  },
   'V8 Linux64 - internal snapshot': {
     'swarming_dimensions' : {
       'os': 'Ubuntu-18.04',