[Driver] Add -Wno-msvc-not-found to %clang_cl -Werror tests that don't want the diagnostic

and remove a -### -fno-integrated-as test that would fail with --target=x86_64-windows-msvc.

Author: MaskRay

clang/test/Driver/cl-options.c

@@ -196,20 +196,20 @@
 // PR24003: -mframe-pointer=all
 // PR24003: -Os
 
-// RUN: not %clang_cl --target=i686-pc-win32 -Werror /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_2 %s
+// RUN: %clang_cl --target=i686-pc-win32 -Werror -Wno-msvc-not-found /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_2 %s
 // Oy_2: -mframe-pointer=all
 // Oy_2: -O2
 
-// RUN: not %clang_cl --target=aarch64-pc-windows-msvc -Werror /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_aarch64 %s
+// RUN: %clang_cl --target=aarch64-pc-windows-msvc -Werror -Wno-msvc-not-found /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_aarch64 %s
 // Oy_aarch64: -mframe-pointer=non-leaf
 // Oy_aarch64: -O2
 
-// RUN: not %clang_cl --target=i686-pc-win32 -Werror /O2 /O2 -### -- %s 2>&1 | FileCheck -check-prefix=O2O2 %s
+// RUN: %clang_cl --target=i686-pc-win32 -Werror -Wno-msvc-not-found /O2 /O2 -### -- %s 2>&1 | FileCheck -check-prefix=O2O2 %s
 // O2O2: "-O2"
 
 // RUN: %clang_cl /Zs -Werror /Oy -- %s 2>&1
 
-// RUN: not %clang_cl --target=i686-pc-win32 -Werror /Oy- -### -- %s 2>&1 | FileCheck -check-prefix=Oy_ %s
+// RUN: %clang_cl --target=i686-pc-win32 -Werror -Wno-msvc-not-found /Oy- -### -- %s 2>&1 | FileCheck -check-prefix=Oy_ %s
 // Oy_: -mframe-pointer=all
 
 // RUN: %clang_cl /Qvec -### -- %s 2>&1 | FileCheck -check-prefix=Qvec %s

clang/test/Driver/clang-s-opts.s

@@ -1,4 +1,3 @@
 // RUN: %clang -### -c -flto -fno-lto %s 2>&1 | FileCheck %s
-// RUN: %clang -### -c -flto -fno-lto -fno-integrated-as %s 2>&1 | FileCheck %s
 
 // CHECK-NOT: argument unused during compilation