Roll Skia from ca98796cc19e to 4f6568ba7051 (2 revisions) (#52956)

https://skia.googlesource.com/skia.git/+log/ca98796cc19e..4f6568ba7051

2024-05-21 skia-autoroll@skia-public.iam.gserviceaccount.com Roll vulkan-deps from ba47ac8ffa90 to bf00eb856e99 (2 revisions)
2024-05-21 robertphillips@google.com Minor cleanup of stray SkScalerContextEffects

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC brianosman@google.com,jlavrova@google.com,jonahwilliams@google.com,rmistry@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

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

Author: skia-flutter-autoroll

DEPS

@@ -14,7 +14,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': 'ca98796cc19e4ea0ecc32914f2967f003046a282',
+  'skia_revision': '4f6568ba7051c6f125c148a4c8a6d29e3d48c5e7',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 87ffd66259e44e0aeaa697d9559030d5
+Signature: a71d57003e1526bb56dd70a1d8409da7
 
 ====================================================================================================
 LIBRARY: etc1