[llvm] Introduce CovMap in ObjectYAML (PR #127432)

[NAKAMURA Takumi via llvm-commits]

================
@@ -580,6 +596,31 @@ ELFDumper<ELFT>::dumpSections() {
     return Error::success();
   };
 
+  coverage::yaml::DecoderParam Param;
----------------
chapuni wrote:

Exposure of `coverage::yaml::DecoderParam` is not good but it is a minimal exposure to suppress covmap w/o explicit DecoderImpl context. (See `ELFYAML.cpp`)

https://github.com/llvm/llvm-project/pull/127432