Rename the 'android_test_runner_status' result tag in result_sink.py.

The name of the tag is a holdover from when this code was used solely
by the android test runner. It's since been generalized for more users,
so the name of the tag doesn't make too much sense. So rename it to
something more general.

Bug: 1135718
Change-Id: Ica1ffa291473d16aa06d94236acdfa09d61ec5f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3151138
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/main@{#921858}

build/util/lib/results/result_sink.py

@@ -100,7 +100,7 @@ def Post(self,
             },
             {
                 # Status before getting mapped to result_db statuses.
-                'key': 'android_test_runner_status',
+                'key': 'raw_status',
                 'value': status,
             }
         ],