[llvm] [NFC][InstrProf] Move `InstrProfiling` to the .cpp file (PR #75018)

[Kazu Hirata via llvm-commits]

================
@@ -13,21 +13,14 @@
 #ifndef LLVM_TRANSFORMS_INSTRUMENTATION_INSTRPROFILING_H
 #define LLVM_TRANSFORMS_INSTRUMENTATION_INSTRPROFILING_H
 
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/ProfileData/InstrProf.h"
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kazutakahirata wrote:

If `InstrProfiling.h` is becoming this empty, could we just keep `#include "llvm/IR/PassManager.h"` for `PreservedAnalyses` while removing all the other remaining `#include`s?  You can add a couple of forward declarations:

```
class Module;
class ModuleAnalysisManager;
```


https://github.com/llvm/llvm-project/pull/75018