cts: skip atan2 tests on Windows

This is still under investigation, but let's skip for now as it makes
the CTS run very long.

Bug: tint:1524
Change-Id: Ic238ea22119f6165a3d22582bfb93ffd57efed3b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/90560
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: Antonio Maiorano <amaiorano@google.com>
diff --git a/webgpu-cts/expectations.txt b/webgpu-cts/expectations.txt
index 9df9afb..85f5005 100644
--- a/webgpu-cts/expectations.txt
+++ b/webgpu-cts/expectations.txt
@@ -268,7 +268,7 @@
 # shader execution failures
 # KEEP
 ################################################################################
-crbug.com/dawn/0000 webgpu:shader,execution,expression,call,builtin,atan2:* [ Failure ]
+crbug.com/tint/1524 [ win ] webgpu:shader,execution,expression,call,builtin,atan2:* [ Skip ]
 crbug.com/dawn/0000 [ linux ] webgpu:shader,execution,expression,call,builtin,countTrailingZeros:* [ Failure ]
 crbug.com/dawn/0000 [ win ] webgpu:shader,execution,expression,call,builtin,extractBits:* [ Failure ]
 crbug.com/dawn/0000 [ linux ] webgpu:shader,execution,expression,call,builtin,firstTrailingBit:* [ Failure ]