This PR adds targeted testing for SPIR-V 1.4 features. Specifically,
this PR adds testing for the NoSignedWrap and NoUnsignedWrap
decorations.
We can reuse large parts of the testing for the
`cl_khr_spirv_no_integer_wrap_decoration` extension to test the SPIR-V
1.4 feature.
This PR adds targeted testing for SPIR-V 1.4 features. Specifically,
this PR adds testing for:
1. The new Image Operand for SignExtend and ZeroExtend.
2. The new Loop Controls MinIterations, MaxIterations,
IterationMultiple, PeelCount, and PartialCount.
* basic SPIR-V 1.3 testing support
* updated script to compile for more SPIR-V versions
* switch to general SPIR-V versions test
* update copyright text and fix license
* improve output while test is running
* check for higher SPIR-V versions first
* fix formatting
