Sync eng/common directory with azure-sdk-tools for PR 2095 (Azure#24749)

* Mitigate relative path calculation error on multiple iterations

* Revert "Mitigate relative path calculation error on multiple iterations"

This reverts commit 45baedd990c6a3085742a38a4891d8706a93be77.

* GetRelativePath should check if path is already relative before calling [IO.Path]::GetRelativePath

Co-authored-by: Daniel Jurek <djurek@microsoft.com>

Author: azure-sdk

eng/common/scripts/Save-Package-Properties.ps1

@@ -73,6 +73,14 @@ function GetRelativePath($path) {
   if (!$path) {
     return ''
   }
+
+  # If the path is already relative return the path. Calling `GetRelativePath`
+  # on a relative path converts the relative path to an absolute path based on
+  # the current working directory which can result in unexpected outputs.
+  if (![IO.Path]::IsPathRooted($path)) {
+    return $path
+  }
+
   $relativeTo = Resolve-Path $PSScriptRoot/../../../
   # Replace "\" with "/" so the path is valid across other platforms and tools
   $relativePath = [IO.Path]::GetRelativePath($relativeTo, $path) -replace "\\", '/'