Vulkan: Suppress failing test on AMD/Linux

EXTBlendFuncExtendedDrawTest.FragData/* has started flaking for an
unknown reason.  This test has multiple suppressions for the Vulkan
backend on different hardware.

Bug: angleproject:6585
Change-Id: I7b97c8210a0846bbc6935812fcad743291c516be
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3230522
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

src/tests/angle_end2end_tests_expectations.txt

@@ -54,6 +54,7 @@
 6367 LINUX INTEL OPENGL : ComputeShaderTest.DispatchGenerateMipmapDispatch/* = SKIP
 1252169 LINUX AMD OPENGL : ComputeShaderTest.ImageBufferMapWrite/* = SKIP
 1252169 LINUX AMD OPENGL : ComputeShaderTest.BufferImageBufferMapWrite/* = SKIP
+6585 LINUX AMD VULKAN : EXTBlendFuncExtendedDrawTest.FragData/* = SKIP
 
 // Nvidia
 6115 NVIDIA OPENGL : GLSLTestLoops.DoWhileContinue/* = SKIP