QmlDesigner: Use QStringView to avoid some allocations

std::ranges would be even more optimal but we can do that later.

Change-Id: I81a949bc1f9149e8a33bed88dc5ff9a9949bdc20
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/qmlpuppetcommunication/types/enumeration.h

@@ -29,7 +29,7 @@ public:
         : m_enumerationName{text, static_cast<qsizetype>(std::strlen(text))}
     {}
 
-    Enumeration(const QString &enumerationName)
+    Enumeration(QStringView enumerationName)
         : m_enumerationName(enumerationName.toUtf8())
     {}
 

src/plugins/qmldesigner/libs/designercore/rewriter/texttomodelmerger.cpp

@@ -550,9 +550,9 @@ public:
                            const NodeMetaInfo &metaInfo,
                            const QString &propertyPrefix,
                            AST::UiQualifiedId *propertyId,
-                           const QString &astValue)
+                           QStringView astValue)
     {
-        QStringList astValueList = astValue.split(u'.');
+        QList<QStringView> astValueList = astValue.split(u'.');
 
         if (astValueList.size() == 2) {
             //Check for global Qt enums