[clang] [clang][DependencyScanner] Remove all warning flags when suppressing warnings (PR #71612)

[Jan Svoboda via cfe-commits]

================
@@ -0,0 +1,84 @@
+// RUN: rm -rf %t
----------------
jansvoboda11 wrote:

Could you add a short summary of what this test is for?

https://github.com/llvm/llvm-project/pull/71612