fixed some Variable copied when it could be moved Coverity warnings (#7742)

Author: firewave

lib/library.cpp

@@ -39,6 +39,7 @@
 #include <stdexcept>
 #include <string>
 #include <unordered_set>
+#include <utility>
 
 #include "xml.h"
 
@@ -241,7 +242,7 @@ Library::Error Library::load(const char exename[], const char path[], bool debug
         if (mData->mFiles.find(absolute_path) == mData->mFiles.end()) {
             Error err = load(doc);
             if (err.errorcode == ErrorCode::OK)
-                mData->mFiles.insert(absolute_path);
+                mData->mFiles.insert(std::move(absolute_path));
             return err;
         }
 

lib/symboldatabase.cpp

@@ -51,6 +51,7 @@
 #include <type_traits>
 #include <unordered_map>
 #include <unordered_set>
+#include <utility>
 //---------------------------------------------------------------------------
 
 SymbolDatabase::SymbolDatabase(Tokenizer& tokenizer)
@@ -2212,7 +2213,7 @@ void SymbolDatabase::debugSymbolDatabase() const
             }
             errorPath.emplace_back(tok, "");
             mErrorLogger.reportErr(
-                {errorPath, &mTokenizer.list, Severity::debug, "valueType", msg, CWE{0}, Certainty::normal});
+                {std::move(errorPath), &mTokenizer.list, Severity::debug, "valueType", msg, CWE{0}, Certainty::normal});
         }
     }
 }

lib/valueflow.cpp

@@ -128,6 +128,7 @@
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
+#include <utility>
 #include <vector>
 
 static void bailoutInternal(const std::string& type,
@@ -7275,7 +7276,7 @@ static void valueFlowDebug(TokenList& tokenlist, ErrorLogger& errorLogger, const
             ErrorPath errorPath = v.errorPath;
             errorPath.insert(errorPath.end(), v.debugPath.cbegin(), v.debugPath.cend());
             errorPath.emplace_back(tok, "");
-            errorLogger.reportErr({errorPath, &tokenlist, Severity::debug, "valueFlow", msg, CWE{0}, Certainty::normal});
+            errorLogger.reportErr({std::move(errorPath), &tokenlist, Severity::debug, "valueFlow", msg, CWE{0}, Certainty::normal});
         }
     }
 }