Merge pull request #1726 from vsafonkin/v-vlsafo/add-pipx-ubuntu

[ubuntu] Add pipx and install yamllint and aws sam cli through it.

images/linux/scripts/SoftwareReport/SoftwareReport.Common.psm1

@@ -245,4 +245,8 @@ function Get-AptPackages {
     $apt = $toolsetJson.apt
     $pkgs = ($apt.common_packages + $apt.cmd_packages | Sort-Object) -join ", "
     return $pkgs
+}
+
+function Get-PipxVersion {
+    return "Pipx $(pipx --version 2> $null)"
 }