fix(accelerator): Adding name method in XPUAccelerator (#3108)

* Update xpu.py regarind PR #3092

Added the name method to fix an issue related to a newly added feature in lightning 2.5.6

Signed-off-by: Niclas <152474825+waschsalz@users.noreply.github.com>

* Update xpu.py

Signed-off-by: Niclas <152474825+waschsalz@users.noreply.github.com>

* Update xpu.py

Signed-off-by: Niclas <152474825+waschsalz@users.noreply.github.com>

* Update xpu.py with docstring

Signed-off-by: Niclas <152474825+waschsalz@users.noreply.github.com>

* Update xpu.py with correct docstring

Signed-off-by: Niclas <152474825+waschsalz@users.noreply.github.com>

* added name method for XPUAccelerator

Signed-off-by: waschsalz <niclas.zschach@icloud.com>

---------

Signed-off-by: Niclas <152474825+waschsalz@users.noreply.github.com>
Signed-off-by: waschsalz <niclas.zschach@icloud.com>

Author: waschsalz

src/anomalib/engine/accelerator/xpu.py

@@ -12,7 +12,10 @@
 class XPUAccelerator(Accelerator):
     """Support for a XPU, optimized for large-scale machine learning."""
 
-    accelerator_name = "xpu"
+    @property
+    def name(self) -> str:
+        """Setting the name of the accelerator which is required for accelerators by pytorch-lightning >= 2.5.6."""
+        return "xpu"
 
     @staticmethod
     def setup_device(device: torch.device) -> None:
@@ -59,7 +62,7 @@ def teardown(self) -> None:
 
 
 AcceleratorRegistry.register(
-    XPUAccelerator.accelerator_name,
+    XPUAccelerator().name,
     XPUAccelerator,
     description="Accelerator supports XPU devices",
 )