[ubuntu] Rename build scripts (#8866)

* [ubuntu] Rename build scripts

* [ubuntu] Change reboot to inline shell

* [ubuntu] Move disk space validation to pester tests

* [ubuntu] Rename helper and tests files

* [ubuntu] Changes to cleanup, post-deployment and r scripts

images/ubuntu/scripts/docs-gen/SoftwareReport.Helpers.psm1

@@ -0,0 +1,41 @@
+function Take-OutputPart {
+    param (
+        [Parameter(ValueFromPipeline)]
+        [string] $toolOutput,
+        [string] $Delimiter = " ",
+        [int[]] $Part
+    )
+    $parts = $toolOutput.Split($Delimiter, [System.StringSplitOptions]::RemoveEmptyEntries)
+    $selectedParts = $parts[$Part]
+    return [string]::Join($Delimiter, $selectedParts)
+}
+
+function Restore-UserOwner {
+    sudo chown -R ${env:USER}: $env:HOME
+}
+
+function Get-LinkTarget {
+    param (
+        [string] $inputPath
+    )
+    $link = Get-Item $inputPath | Select-Object -ExpandProperty Target
+    if ($link) {
+      return " -> $link"
+    }
+    return ""
+}
+
+function Get-PathWithLink {
+    param (
+        [string] $inputPath
+    )
+    $link = Get-LinkTarget($inputPath)
+    return "${inputPath}${link}"
+}
+
+function Get-AptSourceRepository {
+    param([String] $PackageName)
+
+    $sourceUrl = Get-Content "$PSScriptRoot/../helpers/apt-sources.txt" | Select-String -Pattern $PackageName | Take-OutputPart -Part (1..3)
+    return $sourceUrl
+}