weblayer, skew tests: Add M88 skew tests

This skew test will updated daily by uploading new CIPD packages
for each tag created in the M88 branch. The m88 reference will point
to the most recent package uploaded.

Bug: 1147459, 1147455, 1099017, 1041619
Change-Id: Ib9ae51d2a7379d478cbab68a334c7d2488bf0e8a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2538152
Auto-Submit: Rakib Hasan <rmhasan@google.com>
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827411}

testing/buildbot/test_suites.pyl

@@ -5971,9 +5971,11 @@
       },
       'weblayer_instrumentation_version_tests': {
         'variants': [
+          'WEBLAYER_IMPL_SKEW_TESTS_M88_NIGHTLY',
           'WEBLAYER_IMPL_SKEW_TESTS_NTH_MILESTONE',
           'WEBLAYER_IMPL_SKEW_TESTS_NTH_MINUS_ONE_MILESTONE',
           'WEBLAYER_IMPL_SKEW_TESTS_NTH_MINUS_TWO_MILESTONE',
+	  'WEBLAYER_CLIENT_SKEW_TESTS_M88_NIGHTLY',
           'WEBLAYER_CLIENT_SKEW_TESTS_NTH_MILESTONE',
           'WEBLAYER_CLIENT_SKEW_TESTS_NTH_MINUS_ONE_MILESTONE',
           'WEBLAYER_CLIENT_SKEW_TESTS_NTH_MINUS_TWO_MILESTONE',

testing/buildbot/variants.pyl

@@ -307,6 +307,52 @@
     ],
     'identifier': 'iPhone X 14.2'
   },
+  'WEBLAYER_IMPL_SKEW_TESTS_M88_NIGHTLY': {
+    'args': [
+      '--test-runner-outdir',
+      '.',
+      '--client-outdir',
+      '.',
+      '--implementation-outdir',
+      '../../weblayer_instrumentation_test_M88/out/Release',
+      '--test-expectations',
+      '../../weblayer/browser/android/javatests/skew/expectations.txt',
+      '--impl-version=88',
+    ],
+    'identifier': 'M88 Implementation Tests',
+    'swarming': {
+      'cipd_packages': [
+        {
+          'cipd_package': 'chromium/testing/weblayer-x86',
+          'location': 'weblayer_instrumentation_test_M88',
+          'revision': 'm88',
+        }
+      ],
+    },
+  },
+  'WEBLAYER_CLIENT_SKEW_TESTS_M88_NIGHTLY': {
+    'args': [
+      '--test-runner-outdir',
+      '.',
+      '--client-outdir',
+      '../../weblayer_instrumentation_test_M88/out/Release',
+      '--implementation-outdir',
+      '.',
+      '--test-expectations',
+      '../../weblayer/browser/android/javatests/skew/expectations.txt',
+      '--client-version=88',
+    ],
+    'identifier': 'M88 Client Tests',
+    'swarming': {
+      'cipd_packages': [
+        {
+          'cipd_package': 'chromium/testing/weblayer-x86',
+          'location': 'weblayer_instrumentation_test_M88',
+          'revision': 'm88',
+        }
+      ],
+    },
+  },
   'WEBLAYER_IMPL_SKEW_TESTS_NTH_MILESTONE': {
     'args': [
       '--test-runner-outdir',
@@ -445,4 +491,4 @@
       ],
     },
   },
-}
\ No newline at end of file
+}