CI: Set vstsFeed with an environment variable

Visit "https://feeds.dev.azure.com/${YOUR_ORGANIZATION_HERE}/_apis/packaging/feeds"
to find the "fullyQualifiedId" of your organization's
default artifact feed. That value is what you should set
the "ARTIFACT_FEED" environment variable to in Azure DevOps UI.

(IDs are formatted like this: "af6c77da-ef34-bcde-daaf-e2b489a23b2c")

The "description" for the feed should say "Default feed for ${organization}",
e.g. "Default feed for atomcommunity". If the description says something else,
or "null", then it's the wrong feed.

Author: DeeDeeG

script/vsts/platforms/linux.yml

@@ -35,7 +35,7 @@ jobs:
         inputs:
           keyfile: 'package.json, script/vsts/platforms/linux.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
 
       - script: script/bootstrap
         displayName: Bootstrap build environment
@@ -52,7 +52,7 @@ jobs:
         inputs:
           keyfile: 'package.json, script/vsts/platforms/linux.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
 
       - script: script/lint
         displayName: Run linter

script/vsts/platforms/macos.yml

@@ -25,7 +25,7 @@ jobs:
         inputs:
           keyfile: 'package.json, script/vsts/platforms/macos.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
 
       - script: script/bootstrap
         displayName: Bootstrap build environment
@@ -41,7 +41,7 @@ jobs:
         inputs:
           keyfile: 'package.json, script/vsts/platforms/macos.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
 
       - script: script/lint
         displayName: Run linter
@@ -126,7 +126,7 @@ jobs:
         inputs:
           keyfile: 'package.json, script/vsts/platforms/macos.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
 
       # The artifact caching task does not work on forks, so we need to
       # bootstrap again for pull requests coming from forked repositories.

script/vsts/platforms/windows.yml

@@ -53,15 +53,15 @@ jobs:
         inputs:
           keyfile: 'package.json, script/vsts/platforms/windows.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json, script/vsts/x64-cache-key'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
         condition: eq(variables['buildArch'], 'x64')
 
       - task: 1ESLighthouseEng.PipelineArtifactCaching.RestoreCacheV1.RestoreCache@1
         displayName: Restore node_modules cache (x86)
         inputs:
           keyfile: 'package.json, script/vsts/platforms/windows.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json, script/vsts/x86-cache-key'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
         condition: eq(variables['buildArch'], 'x86')
 
       - script: |
@@ -80,15 +80,15 @@ jobs:
         inputs:
           keyfile: 'package.json, script/vsts/platforms/windows.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json, script/vsts/x64-cache-key'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
         condition: eq(variables['buildArch'], 'x64')
 
       - task: 1ESLighthouseEng.PipelineArtifactCaching.SaveCacheV1.SaveCache@1
         displayName: Save node_modules cache (x86)
         inputs:
           keyfile: 'package.json, script/vsts/platforms/windows.yml, **/package-lock.json, !**/node_modules/**/package-lock.json, !**/.*/**/package-lock.json, script/vsts/x86-cache-key'
           targetfolder: '**/node_modules, !**/node_modules/**/node_modules'
-          vstsFeed: 'bae1bc26-220d-43c7-a955-4de039370de2'
+          vstsFeed: $(ARTIFACT_FEED)
         condition: eq(variables['buildArch'], 'x86')
 
       - script: node script\vsts\windows-run.js script\lint.cmd