re-evaluate building for AVX512 targets with flang-18 on Windows

.github/workflows/dynamic_arch.yml

@@ -176,7 +176,7 @@ jobs:
             fc-pkg: fc
             # Compiling with Flang 16 seems to cause test errors on machines
             # with AVX512 instructions. Revisit after MSYS2 distributes Flang 17.
-            no-avx512-flags: -DNO_AVX512=1
+            # no-avx512-flags: -DNO_AVX512=1
           - msystem: CLANG32
             idx: int32
             target-prefix: mingw-w64-clang-i686
@@ -194,7 +194,7 @@ jobs:
             fc-pkg: fc
             # Compiling with Flang 16 seems to cause test errors on machines
             # with AVX512 instructions. Revisit after MSYS2 distributes Flang 17.
-            no-avx512-flags: -DNO_AVX512=1
+            # no-avx512-flags: -DNO_AVX512=1
           - msystem: UCRT64
             idx: int32
             target-prefix: mingw-w64-ucrt-x86_64