COMPMID-1559 : (Nightly) CLWinograd FP16 SIGABORT and mismatches

Current implementation of winograd fp16 is not accurate enough for large runs.
disabling its use and reopening ticket(COMPMID-1266) to fix it.

The sigbus error that was originally reported against COMPMID-1559 is being tracked as COMPMID-1606

Change-Id: I45129aa366d5710402bc54b623c5fbfb865b3cd5
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/151543
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Isabella Gottardi <isabella.gottardi@arm.com>
diff --git a/tests/validation/CL/Winograd.cpp b/tests/validation/CL/Winograd.cpp
index 3762e39..930f7aa 100644
--- a/tests/validation/CL/Winograd.cpp
+++ b/tests/validation/CL/Winograd.cpp
@@ -834,7 +834,7 @@
 TEST_SUITE_END() // Conv1x5
 TEST_SUITE_END() // FP32
 
-
+#ifdef WINOGRAD_F16_SUPPORT //to be reintroduced after COMPMID-1266 is resolved
 TEST_SUITE(FP16)
 
 using CLWinogradConvolutionLayerFastMathFixture16 = WinogradConvolutionLayerFastMathValidationFixture<CLTensor, CLAccessor, CLWinogradConvolutionLayer, half>;
@@ -977,7 +977,7 @@
 TEST_SUITE_END() // Conv1x5
 
 TEST_SUITE_END() // FP16
-
+#endif /*#ifdef WINOGRAD_F16_SUPPORT*/
 TEST_SUITE_END() // ConvolutionLayer
 TEST_SUITE_END() // Winograd
 TEST_SUITE_END() // CL