win_shortcut: Add missing $check_mode definition + bugfix + tests (#20911)

* win_shortcut: Add missing $check_mode definition

For some reason this entry was missing, possible a merge-conflict gone
wrong :-(

* Added integration tests and bugfix

Add missing changes.

lib/ansible/modules/windows/win_shortcut.ps1

@@ -24,6 +24,7 @@
 $ErrorActionPreference = "Stop"
 
 $params = Parse-Args $args -supports_check_mode $true
+$check_mode = Get-AnsibleParam -obj $params -name "_ansible_check_mode" -type "bool" -default $false
 
 $src = Get-AnsibleParam -obj $params -name "src" -type "path" -default $null
 $dest = Get-AnsibleParam -obj $params -name "dest" -type "path" -failifempty $true
@@ -78,6 +79,13 @@ If ($state -eq "absent") {
 
     # Compare existing values with new values, report as changed if required
 
+    If ($src -ne $null) {
+        # Windows translates executables to absolute path, so do we
+        If (Get-Command -Name $src -Type Application -ErrorAction SilentlyContinue) {
+            $src = (Get-Command -Name $src -Type Application).Definition
+        }
+    }
+
     If ($src -ne $null -and $ShortCut.TargetPath -ne $src) {
         $result.changed = $true
         $ShortCut.TargetPath = $src