infra: Enable flaky retries on Mac end2end_tests.

These tests are heavily flaking and causing CQ churn. Mark them
as retriable until we can root cause the flakiness.

Bug: angleproject:6570
Change-Id: I9886a655b88737acbe7ce728fa32573ac4d6145f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3289104
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

infra/specs/angle.json

@@ -2524,7 +2524,8 @@
         "args": [
           "angle_end2end_tests",
           "--gtest_filter=-*Vulkan_SwiftShader*",
-          "--bot-mode"
+          "--bot-mode",
+          "--flaky-retries=2"
         ],
         "merge": {
           "args": [],
@@ -2751,7 +2752,8 @@
         "args": [
           "angle_end2end_tests",
           "--gtest_filter=-*Vulkan_SwiftShader*",
-          "--bot-mode"
+          "--bot-mode",
+          "--flaky-retries=2"
         ],
         "merge": {
           "args": [],
@@ -2808,7 +2810,8 @@
         "args": [
           "angle_end2end_tests",
           "--gtest_filter=-*Vulkan_SwiftShader*",
-          "--bot-mode"
+          "--bot-mode",
+          "--flaky-retries=2"
         ],
         "merge": {
           "args": [],

infra/specs/test_suites.pyl

@@ -1017,12 +1017,12 @@
       'angle_deqp_gles2_metal_gtests',
       'angle_deqp_gles3_gl_gtests',
       'angle_deqp_gles3_metal_gtests',
-      'angle_end2end_gtests',
+      'angle_end2end_with_retry_gtests',
       'angle_unit_gtests',
     ],
 
     'mac_nvidia_gtests': [
-      'angle_end2end_gtests',
+      'angle_end2end_with_retry_gtests',
       'angle_unit_gtests',
     ],
 

scripts/code_generation_hashes/Test_spec_JSON.json

@@ -1,6 +1,6 @@
 {
   "infra/specs/angle.json":
-    "87c43ade0ddfe9f1de7914254a4b74ec",
+    "6a0bb237477d8189f57540ab1cc9a0ca",
   "infra/specs/generate_test_spec_json.py":
     "4be9deb362129fb37eb0ad76ed2d8c11",
   "infra/specs/mixins.pyl":
@@ -8,7 +8,7 @@
   "infra/specs/test_suite_exceptions.pyl":
     "723460da84a90884a9668c07a0893390",
   "infra/specs/test_suites.pyl":
-    "23cdc99c5c38ec9e2e82a60a1b3a10dc",
+    "aea7a205aae6cda4799aaed96a6df4e1",
   "infra/specs/variants.pyl":
     "8cfcaa99fa07ad2a2d5d14f220fd5037",
   "infra/specs/waterfalls.pyl":