Run Dawn end2end tests on Win and Mac GPU FYI and optional builders

Also fixes Win7 AMD GPU bots to use win7-specific test suites and
not the generic test suite.

This adds the end2end tests to the following builders:
 - Mac FYI 10.14 Release (AMD)
 - Mac FYI 10.14 Release (Intel)
 - Mac FYI 10.14 Release (NVIDIA)
 - Mac FYI Debug (Intel)
 - Mac FYI Experimental Release (Intel)
 - Mac FYI Experimental Retina Release (AMD)
 - Mac FYI Experimental Retina Release (NVIDIA)
 - Mac FYI GPU ASAN Release
 - Mac FYI Release (Intel)
 - Mac FYI Retina Debug (AMD)
 - Mac FYI Retina Debug (NVIDIA)
 - Mac FYI Retina Release (AMD)
 - Mac FYI Retina Release (NVIDIA)
 - Mac Pro FYI Release (AMD)
 - Optional Mac Release (Intel)
 - Optional Mac Retina Release (AMD)
 - Optional Mac Retina Release (NVIDIA)
 - Optional Win10 Release (Intel HD 630)
 - Optional Win10 Release (NVIDIA)
 - Win10 FYI Debug (NVIDIA)
 - Win10 FYI Exp Release (Intel HD 630)
 - Win10 FYI Exp Release (NVIDIA)
 - Win10 FYI Release (Intel HD 630)
 - Win10 FYI Release (NVIDIA)

BUG=chromium:901830

Change-Id: I9ef3a3232f178c057f6d70dc3c989361967c4773
Reviewed-on: https://chromium-review.googlesource.com/c/1354923Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612623}

testing/buildbot/test_suites.pyl

@@ -2829,6 +2829,7 @@
       'gpu_angle_end2end_tests',
       'gpu_angle_unittests',
       'gpu_common_gtests',
+      'gpu_dawn_end2end_tests',
       'gpu_fyi_and_optional_non_linux_gtests',
       'gpu_fyi_desktop_specific_gtests',
       'gpu_fyi_mac_specific_gtests',
@@ -2836,6 +2837,7 @@
 
     'gpu_fyi_mac_optional_gtests': [
       'gpu_angle_end2end_tests',
+      'gpu_dawn_end2end_tests',
       'gpu_fyi_and_optional_non_linux_gtests',
       'gpu_fyi_desktop_specific_gtests',
       'gpu_fyi_mac_specific_gtests',
@@ -2845,6 +2847,7 @@
       'gpu_angle_end2end_tests',
       'gpu_angle_unittests',
       'gpu_common_gtests',
+      'gpu_dawn_end2end_tests',
       'gpu_desktop_specific_gtests',
       'gpu_fyi_and_optional_non_linux_gtests',
       'gpu_fyi_desktop_specific_gtests',
@@ -2924,6 +2927,7 @@
       'gpu_angle_unittests',
       'gpu_angle_white_box_tests',
       'gpu_common_gtests',
+      'gpu_dawn_end2end_tests',
       'gpu_default_and_optional_win_specific_gtests',
       'gpu_desktop_specific_gtests',
       'gpu_fyi_and_optional_non_linux_gtests',
@@ -2935,6 +2939,7 @@
     'gpu_fyi_win_optional_gtests': [
       'gpu_angle_end2end_tests',
       'gpu_angle_white_box_tests',
+      'gpu_dawn_end2end_tests',
       'gpu_default_and_optional_win_specific_gtests',
       'gpu_fyi_and_optional_non_linux_gtests',
       'gpu_fyi_and_optional_win_specific_gtests',

testing/buildbot/waterfalls.pyl

@@ -2724,7 +2724,7 @@
           'win7_amd_r7_240',
         ],
         'test_suites': {
-          'gtest_tests': 'gpu_fyi_win_gtests',
+          'gtest_tests': 'gpu_fyi_win7_gtests',
           'gpu_telemetry_tests': 'gpu_fyi_win_debug_telemetry_tests',
         },
       },
@@ -2735,7 +2735,7 @@
           'win7_amd_r7_240',
         ],
         'test_suites': {
-          'gtest_tests': 'gpu_fyi_win_gtests',
+          'gtest_tests': 'gpu_fyi_win7_gtests',
           'gpu_telemetry_tests': 'gpu_fyi_win_amd_telemetry_tests',
         },
       },