[Analysis][NFC] Include LoopInfoImpl only in source file (#187459)

There's no need to include the full LoopInfo implementation in every
source file that uses LoopInfo.

Pull Request: https://github.com/llvm/llvm-project/pull/187459

llvm/include/llvm/Analysis/LoopInfo.h

@@ -18,7 +18,7 @@
 #include "llvm/IR/PassManager.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/Compiler.h"
-#include "llvm/Support/GenericLoopInfoImpl.h"
+#include "llvm/Support/GenericLoopInfo.h"
 #include <optional>
 #include <utility>
 

llvm/lib/Analysis/LoopInfo.cpp

@@ -38,6 +38,7 @@
 #include "llvm/InitializePasses.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Compiler.h"
+#include "llvm/Support/GenericLoopInfoImpl.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;