Switch GPU Win10 Exp to stable

Switches the win10_intel_hd_630_experimental mixin back to triggering
tests on the stable driver version, as the experimental version has some
issues that will prevent us from promoting it to stable.

TBR=ynovikov@chromium.org

Bug: 1016459
Change-Id: I32ca010c0a90b893eb69b8c9a1f624b4f6de2827
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1925422Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#716889}

testing/buildbot/mixins.pyl

@@ -597,7 +597,7 @@
     # Currently same as stable version.
     'swarming': {
       'dimensions': {
-        'gpu': '8086:5912-26.20.100.7323',
+        'gpu': '8086:5912-24.20.100.6286',
         'os': 'Windows-10',
         'pool': 'Chrome-GPU',
       },

testing/buildbot/waterfalls.pyl

@@ -3156,9 +3156,7 @@
           'win10_intel_hd_630_experimental',
         ],
         'test_suites': {
-          'gtest_tests': 'gpu_fyi_win_gtests',
-          'isolated_scripts': 'gpu_angle_and_desktop_representative_perf_fyi_isolated_scripts',
-          'gpu_telemetry_tests': 'gpu_fyi_win_intel_release_telemetry_tests',
+          'gpu_telemetry_tests': 'gpu_noop_sleep_telemetry_test',
         },
       },
       'Win10 FYI x64 Exp Release (NVIDIA)': {