[HLSL] Apply NoRecurse attrib to all HLSL functions (#105907) Previously, functions named "main" got the NoRecurse attribute consistent with the behavior of C++, which HLSL largely follows. However, standard recursion is not allowed in HLSL, so all functions should really have this attribute. This doesn't prevent recursion, but rather signals that these functions aren't expected to recurse. Practically, this was done so that entry point functions named "main" would have all have the same attributes as otherwise identical entry points with other names. This required small changes to the this assignment tests because they no longer generate so many attribute sets since more of them match. related to #105244 but done to simplify testing for #89806
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