Recognize CUDA header file type (.cuh)

This PR mirrors the fix in
8804128

.cuh is widely used as suffix for CUDA. It is made more prominent since
"cub" (https://nvlabs.github.io/cub/) recently distributed with CUDA
ToolKit 11, hence, now .cuh headers are in every CUDA ToolKit
distribution.

I would like to continue with this PR and fix any breakages that may encounter.

Closes #12134.

PiperOrigin-RevId: 351755442

src/main/java/com/google/devtools/build/lib/rules/cpp/CppFileTypes.java

@@ -49,7 +49,7 @@ public final class CppFileTypes {
 
   public static final FileType CPP_HEADER =
       FileType.of(
-          ".h", ".hh", ".hpp", ".ipp", ".hxx", ".h++", ".inc", ".inl", ".tlh", ".tli", ".H",
+          ".cuh", ".h", ".hh", ".hpp", ".ipp", ".hxx", ".h++", ".inc", ".inl", ".tlh", ".tli", ".H",
           ".tcc");
   public static final FileType PCH = FileType.of(".pch");
   public static final FileTypeSet OBJC_HEADER = FileTypeSet.of(CPP_HEADER, PCH);