Support creating tarball package for Linux and macOS (#5085)

* Support creating tarball package for Linux and macOS

* Address comments

tools/releaseBuild/Images/GenericLinuxFiles/PowerShellPackage.ps1

@@ -11,11 +11,13 @@ param (
     [ValidatePattern("^v\d+\.\d+\.\d+(-\w+\.\d+)?$")]
     [ValidateNotNullOrEmpty()]
     [string]$ReleaseTag,
-    [switch]$AppImage
+
+    [ValidateSet("AppImage", "tar")]
+    [string[]]$ExtraPackage
 )
 
 $releaseTagParam = @{}
-if($ReleaseTag)
+if ($ReleaseTag)
 {
     $releaseTagParam = @{ 'ReleaseTag' = $ReleaseTag }
 }
@@ -25,14 +27,15 @@ try {
     Set-Location $location
     Import-Module "$location/build.psm1"
     Import-Module "$location/tools/packaging"
-    
+
     Start-PSBootstrap -Package -NoSudo
     Start-PSBuild -Crossgen -PSModuleRestore @releaseTagParam
 
     Start-PSPackage @releaseTagParam
-    if($AppImage.IsPresent)
+    switch ($ExtraPackage)
     {
-        Start-PSPackage -Type AppImage @releaseTagParam
+        "AppImage" { Start-PSPackage -Type AppImage @releaseTagParam }
+        "tar"      { Start-PSPackage -Type tar @releaseTagParam }
     }
 }
 finally
@@ -40,18 +43,10 @@ finally
     Pop-Location
 }
 
-$linuxPackages = Get-ChildItem "$location/powershell*" -Include *.deb,*.rpm
-    
-foreach($linuxPackage in $linuxPackages) 
-{ 
-    Copy-Item -Path $linuxPackage.FullName -Destination $destination -force
-}
-
-if($AppImage.IsPresent)
+$linuxPackages = Get-ChildItem "$location/powershell*" -Include *.deb,*.rpm,*.AppImage,*.tar.gz
+foreach ($linuxPackage in $linuxPackages)
 {
-    $appImages = Get-ChildItem -Path $location -Filter '*.AppImage'
-    foreach($appImageFile in $appImages) 
-    { 
-        Copy-Item -Path $appImageFile.FullName -Destination $destination -force
-    }
+    $filePath = $linuxPackage.FullName
+    Write-Verbose "Copying $filePath to $destination" -Verbose
+    Copy-Item -Path $filePath -Destination $destination -force
 }