Fix undefined behaviour by allowing NaNs

Fix undefined behaviour by allowing NaNs

One graphicsfuzz test contains computations with the float constant 0x1.8p+128.
This constant represents a NaN value. The computation with undef in the test
allows any optimization/triggers undefined behavior and the driver is free
to crash. Adding OpExecutionMode %4 SignedZeroInfNanPreserve 32 to the CTS fixes
this by allowing NaNs.

Affects:
dEQP-VK.graphicsfuzz.cov-instruction-simplify-atanh-log-undefined

Components: Vulkan

VK-GL-CTS issue: 3787

Change-Id: I2442bc4f50add8b8f779dbfae3c5fe2be8fd85f4