[ci] Use dl.internalx.com when building on private Jenkins

(cherry picked from commit 9d4aa950aac64d0b673b107bd99fa784a00e3b1d)

scripts/ci/pipeline/osx-package.groovy

@@ -69,8 +69,8 @@ node ("mono-package") {
                     echo "Not a release job, skipping signing."
                 }
 
-                def storageAccount = (isPrivate ? "bosstoragemirror.blob.core.windows.net" : "xamjenkinsartifact.azureedge.net")
-                def packageUrl = "https://${storageAccount}/${jobName}/${monoBranch}/${env.BUILD_NUMBER}/${commitHash}"
+                def downloadHost = (isPrivate ? "dl.internalx.com" : "xamjenkinsartifact.azureedge.net")
+                def packageUrl = "https://${downloadHost}/${jobName}/${monoBranch}/${env.BUILD_NUMBER}/${commitHash}"
                 currentBuild.description = "<hr/><h2>DOWNLOAD: <a href=\"${packageUrl}/${packageFileName}\">${packageFileName}</a></h2><hr/>"
 
                 if (isReleaseJob) { utils.reportGitHubStatus (isPr ? env.ghprbActualCommit : commitHash, 'artifacts.json', "${packageUrl}/artifacts.json", 'SUCCESS', '') }