Clang: Move fetchPrecompiledHeader to PrecompiledHeaderStorage

It went for historical reasons in the symbol storage.

Change-Id: If05edb868901884f3951d0eb2f152566e99b4d1a
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangrefactoringbackend/source/symbolindexing.h

@@ -35,6 +35,7 @@
 #include "symbolstorage.h"
 
 #include <builddependenciesstorage.h>
+#include <precompiledheaderstorage.h>
 
 #include <refactoringdatabaseinitializer.h>
 #include <filepathcachingfwd.h>
@@ -83,6 +84,7 @@ public:
                    ProgressCounter::SetProgressCallback &&setProgressCallback)
         : m_filePathCache(filePathCache)
         , m_buildDependencyStorage(database)
+        , m_recompiledHeaderStorage(database)
         , m_symbolStorage(database)
         , m_collectorManger(generatedFiles, database)
         , m_progressCounter(std::move(setProgressCallback))
@@ -119,6 +121,7 @@ private:
     using SymbolIndexerTaskScheduler = TaskScheduler<SymbolsCollectorManager, SymbolIndexerTask::Callable>;
     FilePathCachingInterface &m_filePathCache;
     BuildDependenciesStorage m_buildDependencyStorage;
+    PrecompiledHeaderStorage<Sqlite::Database> m_recompiledHeaderStorage;
     SymbolStorage m_symbolStorage;
     ClangPathWatcher<QFileSystemWatcher, QTimer> m_sourceWatcher{m_filePathCache};
     FileStatusCache m_fileStatusCache{m_filePathCache};
@@ -127,6 +130,7 @@ private:
     SymbolIndexer m_indexer{m_indexerQueue,
                             m_symbolStorage,
                             m_buildDependencyStorage,
+                            m_recompiledHeaderStorage,
                             m_sourceWatcher,
                             m_filePathCache,
                             m_fileStatusCache,