[clang] [HLSL][LongVec] enable support for all elementwise apis (PR #216905)

[Farzon Lotfi via cfe-commits]

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@@ -37,3 +37,21 @@ void test_vector4(float4 Buf) {
   // SPIRV-NEXT: br label %[[ENDL]]
   clip(Buf);
 }
+
+void test_vector5(vector<float, 5> Buf) {
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farzonl wrote:

fair this file didn't have any mention of clip in the other tests, but should be easy enough to make them all consistent.

https://github.com/llvm/llvm-project/pull/216905