[ci] Split Edge Canary into a separate job

Do not run Edge Canary and Edge Dev in the same job to prevent them from
overwriting each other. This also makes Edge setup the same as Safari
(two jobs for Safari & STP) on Azure Pipelines.

Author: Hexcles

.azure-pipelines.yml

@@ -225,8 +225,6 @@ jobs:
   - template: tools/ci/azure/update_manifest.yml
   - script: python ./wpt run --yes --no-manifest-update --install-fonts --manifest MANIFEST.json --metadata infrastructure/metadata/ --log-tbpl - --log-tbpl-level info --channel dev edgechromium infrastructure/
     displayName: 'Run tests (Edge Dev)'
-  - script: python ./wpt run --yes --no-manifest-update --install-fonts --manifest MANIFEST.json --metadata infrastructure/metadata/ --log-tbpl - --log-tbpl-level info --channel canary edgechromium infrastructure/
-    displayName: 'Run tests (Edge Canary)'
   - task: PublishBuildArtifacts@1
     displayName: 'Publish results'
     inputs:
@@ -237,7 +235,7 @@ jobs:
 # All `./wpt run` tests are run from epochs/* branches on a schedule. See
 # documentation at the top of this file for required setup.
 - job: results_edge
-  displayName: 'all tests: Edge'
+  displayName: 'all tests: Edge Dev'
   condition: |
     or(eq(variables['Build.Reason'], 'Schedule'),
        and(eq(variables['Build.Reason'], 'Manual'), variables['run_all_edge']))
@@ -256,12 +254,12 @@ jobs:
       packages: virtualenv
   - template: tools/ci/azure/install_certs.yml
   - template: tools/ci/azure/install_edge.yml
+    parameters:
+      channel: dev
   - template: tools/ci/azure/update_hosts.yml
   - template: tools/ci/azure/update_manifest.yml
   - script: python ./wpt run --yes --no-manifest-update --no-restart-on-unexpected --no-fail-on-unexpected --install-fonts --this-chunk $(System.JobPositionInPhase) --total-chunks $(System.TotalJobsInPhase) --chunk-type hash --log-wptreport $(Build.ArtifactStagingDirectory)/wpt_report_$(System.JobPositionInPhase).json --log-wptscreenshot $(Build.ArtifactStagingDirectory)/wpt_screenshot_$(System.JobPositionInPhase).txt --log-tbpl - --log-tbpl-level info --channel dev edgechromium
     displayName: 'Run tests (Edge Dev)'
-  - script: python ./wpt run --yes --no-manifest-update --no-restart-on-unexpected --no-fail-on-unexpected --install-fonts --this-chunk $(System.JobPositionInPhase) --total-chunks $(System.TotalJobsInPhase) --chunk-type hash --log-wptreport $(Build.ArtifactStagingDirectory)/wpt_report_$(System.JobPositionInPhase).json --log-wptscreenshot $(Build.ArtifactStagingDirectory)/wpt_screenshot_$(System.JobPositionInPhase).txt --log-tbpl - --log-tbpl-level info --channel canary edgechromium
-    displayName: 'Run tests (Edge Canary)'
   - task: PublishBuildArtifacts@1
     displayName: 'Publish results'
     inputs:
@@ -272,6 +270,42 @@ jobs:
     dependsOn: results_edge
     artifactName: edge-results
 
+- job: results_edge_canary
+  displayName: 'all tests: Edge Canary'
+  condition: |
+    or(eq(variables['Build.Reason'], 'Schedule'),
+       and(eq(variables['Build.Reason'], 'Manual'), variables['run_all_edge']))
+  # There are 12 agents in the pool, but use more jobs so that each takes <1h.
+  strategy:
+    parallel: 20
+  timeoutInMinutes: 360
+  pool:
+    name: 'Hosted Windows Client'
+  steps:
+  - template: tools/ci/azure/system_info.yml
+  - template: tools/ci/azure/checkout.yml
+  - template: tools/ci/azure/install_python.yml
+  - template: tools/ci/azure/pip_install.yml
+    parameters:
+      packages: virtualenv
+  - template: tools/ci/azure/install_certs.yml
+  - template: tools/ci/azure/install_edge.yml
+    parameters:
+      channel: canary
+  - template: tools/ci/azure/update_hosts.yml
+  - template: tools/ci/azure/update_manifest.yml
+  - script: python ./wpt run --yes --no-manifest-update --no-restart-on-unexpected --no-fail-on-unexpected --install-fonts --this-chunk $(System.JobPositionInPhase) --total-chunks $(System.TotalJobsInPhase) --chunk-type hash --log-wptreport $(Build.ArtifactStagingDirectory)/wpt_report_$(System.JobPositionInPhase).json --log-wptscreenshot $(Build.ArtifactStagingDirectory)/wpt_screenshot_$(System.JobPositionInPhase).txt --log-tbpl - --log-tbpl-level info --channel canary edgechromium
+    displayName: 'Run tests (Edge Canary)'
+  - task: PublishBuildArtifacts@1
+    displayName: 'Publish results'
+    inputs:
+      artifactName: 'edge-canary-results'
+  - template: tools/ci/azure/cleanup_win10.yml
+- template: tools/ci/azure/fyi_hook.yml
+  parameters:
+    dependsOn: results_edge_canary
+    artifactName: edge-canary-results
+
 - job: results_safari
   displayName: 'all tests: Safari'
   condition: |