sycl/test should not be repeated for different triples #14671
Description
Is your feature request related to a problem? Please describe
This issue is describing a potential internal improvement we can make to our testing infrastructure making our codebase simpler and testing time lower.
We currently define a bunch of targets to launch check-sycl with different triples, like:
https://github.com/intel/llvm/blob/c5ed6e21ef941c874a6d8ee61c0e4b3b23a4aac4/sycl/test/CMakeLists.txt#L97-104
sycl/test are written in assumption and there is no guarantee that any of devices are available and that we can actually launch anything. Therefore, this suite is for checking compilation of SYCL headers and integration of headers with compiler (like checking that the right IR/SPIR-V is produced from a proper SYCL example by our toolchain).
Even if we have some tests which are specific for a backend, they should set the right triple explicitly and we don't need to repeat every other test for a different triple for that.
Describe the solution you would like
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Describe alternatives you have considered
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Additional context
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