[infra] Add dartkp-obfuscate builder to the test matrix (#32229)

Change-Id: I866e0ac6a4ce848d31d36667c712b381a5723098
Reviewed-on: https://dart-review.googlesource.com/72600
Reviewed-by: Martin Kustermann <kustermann@google.com>

tools/bots/test_matrix.json

@@ -364,6 +364,11 @@
         "use-blobs": true
     }},
     "dartkp-linux-(product|release)-x64": { },
+    "dartkp-obsufcate-linux-release-x64": {
+      "options": {
+        "builder-tag": "obfuscated",
+        "vm-options": ["--obfuscate"]
+    }},
     "dartkp-linux-debug-x64": {
       "options": {
         "vm-options": ["--no-enable-malloc-hooks"]
@@ -667,6 +672,32 @@
         }
       ]
     },
+    {
+      "builders": [
+        "vm-kernel-precomp-obfuscate-linux-release-x64"
+      ],
+      "meta": {
+        "description": "This configuration is used by the obfuscated vm kernel precomp builders."
+      },
+      "steps": [
+        {
+          "name": "build dart",
+          "script": "tools/build.py",
+          "arguments": [
+            "runtime_kernel",
+            "dart_precompiled_runtime"
+          ]
+        },
+        {
+          "name": "vm tests",
+          "arguments": [
+            "-ndartkp-obfuscate-${system}-${mode}-${arch}"
+          ],
+          "fileset": "vm-kernel",
+          "shards": 10
+        }
+      ]
+    },
     {
       "builders": [
         "vm-asan-linux-release-x64"