[clang] [Clang] Support includes translated to module imports in -header-include-filtering=direct-per-file (PR #156756)

[Marco Elver via cfe-commits]

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@@ -21,8 +21,13 @@
 #include "header0.h"
 #include "system2.h"
 
+// RUN: rm %t.txt
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melver wrote:

This test is brittle and in incremental build + test using the cached PCMs in `%t` _after_ a binary change to the PCMs will result in memory corruption and random CI failures. I will send a fix for this.

cc @thurstond 

https://github.com/llvm/llvm-project/pull/156756