Use MSBuildDisableNodeReuse=1 in official builds (#5027)

eng/jobs/bash-build.yml

@@ -98,6 +98,11 @@ jobs:
         /p:UsePrebuiltPortableBinariesForInstallers=true
         /p:SharedFrameworkPublishDir=/root/sharedFrameworkPublish/
         $(CommonMSBuildArgs)
+
+      # Disable MSBuild node reuse in case this build is running on a persistent agent.
+      # Use environment variable rather than /nr:false to make sure internal Execs that run MSBuild
+      # commands also disable node reuse.
+      MSBUILDDISABLENODEREUSE: 1
     steps:
 
     - script: df -h

eng/jobs/finalize-publish.yml

@@ -41,6 +41,11 @@ jobs:
     timeoutInMinutes: 120
     variables:
       _PublishType: ${{ parameters._PublishType}}
+
+      # Disable MSBuild node reuse in case this build is running on a persistent agent.
+      # Use environment variable rather than /nr:false to make sure internal Execs that run MSBuild
+      # commands also disable node reuse.
+      MSBUILDDISABLENODEREUSE: 1
     steps:
 
     # Initialize tooling

eng/jobs/windows-build.yml

@@ -32,6 +32,11 @@ jobs:
                           /p:StabilizePackageVersion=$(IsStable)
                           /nr:false"
       MsbuildSigningArguments: /p:CertificateId=400 /v:detailed /p:SignType=$(SignType)
+
+      # Disable MSBuild node reuse in case this build is running on a persistent agent.
+      # Use environment variable rather than /nr:false to make sure internal Execs that run MSBuild
+      # commands also disable node reuse.
+      MSBUILDDISABLENODEREUSE: 1
     steps:
 
     - ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}: