Temporary workaround for an ACL issue on Ubuntu on Azure Pipelines (GH-12649)

.azure-pipelines/posix-steps.yml

@@ -10,6 +10,10 @@ steps:
   clean: true
   fetchDepth: 5
 
+# Work around a known issue affecting Ubuntu VMs on Pipelines
+- script: sudo setfacl -Rb /home/vsts
+  displayName: 'Workaround ACL issue'
+
 - script: ${{ parameters.sudo_dependencies }} ./.azure-pipelines/posix-deps-${{ parameters.dependencies }}.sh $(openssl_version)
   displayName: 'Install dependencies'