Bug 1523562 [wpt PR 15019] - [Azure Pipelines] make the artifact names unique per job, a=testonly

Automatic update from web-platform-tests
[Azure Pipelines] make the artifact names unique per job (#15019)

This will simplify getting restults from master:
https://github.com/web-platform-tests/wpt.fyi/pull/1054

(The artifact name for all_macOS remains 'results'.)
--

wpt-commits: 71a9dc7cfd4a54f888f7a337730324d494ffa43e
wpt-pr: 15019

testing/web-platform/tests/.azure-pipelines.yml

@@ -21,7 +21,7 @@ jobs:
   steps:
   - template: tools/ci/azure/affected_tests.yml
     parameters:
-      artifactName: 'results'
+      artifactName: 'affected-tests'
 
 - job: affected_without_changes_macOS
   displayName: 'affected tests without changes (Safari Technology Preview)'
@@ -33,7 +33,7 @@ jobs:
     parameters:
       checkoutCommit: 'HEAD^1'
       affectedRange: 'HEAD@{1}'
-      artifactName: 'results-without-changes'
+      artifactName: 'affected-tests-without-changes'
 
 # The decision jobs runs `./wpt test-jobs` to determine which jobs to run,
 # and all following jobs wait for it to finish and depend on its output.