[SYCL] Flip default printf implementation #13055
Merged
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Currently, the implementation of printf uses a variadic implementation by default. This proved to be problematic as the implementation would promote float arguments to doubles, implicitly requring fp64. As a result of this, an alternative implementation was introduced, but was made enableable using a SYCL_USE_NON_VARIADIC_SPIRV_OCL_PRINTF directive to avoid problems with targets that did not support it. We expect most relevant backends to support it now, so we flip the default.