[Ubuntu] Reworked clang installation to use default Ubuntu repo (#3834)

images/linux/scripts/SoftwareReport/SoftwareReport.Generator.ps1

@@ -50,16 +50,11 @@ $runtimesList = @(
         (Get-RubyVersion),
         (Get-SwiftVersion),
         (Get-JuliaVersion),
-        (Get-KotlinVersion)
+        (Get-KotlinVersion),
+        (Get-ClangVersions),
+        (Get-ClangFormatVersions)
         ) 
 
-if (Test-IsUbuntu20) {
-    $runtimesList += (Get-LLVMInfo)
-} else {
-    $runtimesList += (Get-ClangVersions)
-    $runtimesList += (Get-ClangFormatVersions)
-}
-
 $markdown += New-MDList -Style Unordered -Lines ($runtimesList | Sort-Object)
 
 $markdown += New-MDHeader "Package Management" -Level 3