dawn.json: split pipeline async status error

GPUPipelineError differentiates between validation and internal errors,
so update the async pipeline creation status accordingly. The "error"
enum value is kept temporarily while Chromium is updated.

Bug: chromium:1404422
Change-Id: Iac8174a9a3d15068caa5dcf815123c5b2b99fe5f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/119240
Reviewed-by: Austin Eng <enga@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

dawn.json

@@ -971,10 +971,12 @@
         "emscripten_no_enum_table": true,
         "values": [
             {"value": 0, "name": "success"},
-            {"value": 1, "name": "error"},
-            {"value": 2, "name": "device lost"},
-            {"value": 3, "name": "device destroyed"},
-            {"value": 4, "name": "unknown"}
+            {"value": 1, "name": "validation error"},
+            {"value": 2, "name": "internal error"},
+            {"value": 3, "name": "device lost"},
+            {"value": 4, "name": "device destroyed"},
+            {"value": 5, "name": "unknown"},
+            {"value": 6, "name": "error"}
         ]
     },
     "create render pipeline async callback": {