Roll vulkan-deps from 838cca34043e to 250e3914595d (2 revisions)

https://chromium.googlesource.com/vulkan-deps.git/+log/838cca34043e..250e3914595d

Changed dependencies:
* vulkan-validation-layers: 19477ce02f..1fe72708f7

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/vulkan-deps-dawn-autoroll
Please CC bclayton@google.com,webgpu-developers@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: bclayton@google.com
Change-Id: I33bd83cf9b24b359c94827110bed211e976ecd0f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/124424
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -142,7 +142,7 @@ deps = {
   },
 
   'third_party/vulkan-deps': {
-    'url': '{chromium_git}/vulkan-deps@838cca34043e66b7988f9151fb83141b2228f4a5',
+    'url': '{chromium_git}/vulkan-deps@250e3914595d8834bb031ee768d424de12e6c7dd',
     'condition': 'dawn_standalone',
   },