[test] Remove -emit-llvm from the and-errors.hlsl test to avoid writing to a potentially write-protected directory (#128047)

@mikaelholmen
[mentioned](#127098 (comment))
that the `-emit-llvm` argument isn't necessary for the `and-errors.hlsl`
test and may cause issues due to writing to the current (potentially
write-protected) directory.

This PR removes the `-emit-llvm` argument from clang in the RUN lines of
the test.

Author: Icohedron

clang/test/SemaHLSL/BuiltIns/and-errors.hlsl

@@ -1,6 +1,5 @@
 // RUN: %clang_cc1 -finclude-default-header -triple \
-// RUN:   dxil-pc-shadermodel6.3-library %s \
-// RUN:   -emit-llvm -O1 -verify
+// RUN:   dxil-pc-shadermodel6.3-library %s -O1 -verify
 
 bool test_too_few_arg(bool a) {
   return __builtin_hlsl_and(a);