[llvm] [DirectX] Set whole-module flags prior to evaluating per-function flags (PR #139967)

[Deric C. via llvm-commits]

================
@@ -8,7 +8,7 @@
 ; CHECK-NEXT: ;       Disable shader optimizations
 
 ; CHECK: ; Shader Flags for Module Functions
-; CHECK: ; Function main : 0x00000000
+; CHECK: ; Function main : 0x00000001
----------------
Icohedron wrote:

The Disable Optimizations flag still exists, so it does still need to be tested.
In this case, the flag is now set on each function instead of only for the whole module, so the tests have been modified to reflect that.

https://github.com/llvm/llvm-project/pull/139967