Copy-DbaDatabase - Fix SetSourceOffline to only run on successful copy

Only set source database offline when the copy operation succeeds.
Previously, the source database would be set offline even if the
restore failed due to insufficient disk space or other errors.

Fixes #9546

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Co-authored-by: Chrissy LeMaire <potatoqualitee@users.noreply.github.com>

Author: github-actions[bot]

public/Copy-DbaDatabase.ps1

@@ -1449,7 +1449,7 @@ function Copy-DbaDatabase {
                         $copyDatabaseStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                     }
 
-                    if ($SetSourceOffline -and $sourceServer.databases[$dbName].status -notlike '*offline*') {
+                    if ($SetSourceOffline -and $copyDatabaseStatus.Status -eq "Successful" -and $sourceServer.databases[$dbName].status -notlike '*offline*') {
                         if ($Pscmdlet.ShouldProcess($source, "Setting $dbName offline")) {
                             Set-DbaDbState -SqlInstance $sourceServer -Database $dbName -Offline -Force
                         }