Utils: Move template file processing from projectexplorer to utils

I want to use it e.g. for snippets and the TextEditor plugin may
not depend on the ProjectExplorer, so the code has to move.

This adds a dependency on QtQml to Utils, but that does not really
matter since that is loaded into QtCreator anyway.

Change-Id: Iada9f40b2966a1fc41631ab33da09812ad67d967
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>

src/plugins/projectexplorer/jsonwizard/jsonwizardfilegenerator.cpp

@@ -39,6 +39,7 @@
 #include <utils/fileutils.h>
 #include <utils/qtcassert.h>
 #include <utils/macroexpander.h>
+#include <utils/templateengine.h>
 
 #include <QCoreApplication>
 #include <QDir>
@@ -164,8 +165,8 @@ Core::GeneratedFiles JsonWizardFileGenerator::fileList(Utils::MacroExpander *exp
                 });
                 nested.registerExtraResolver([expander](QString n, QString *ret) { return expander->resolveMacro(n, ret); });
 
-                gf.setContents(JsonWizard::processText(&nested, QString::fromUtf8(reader.data()),
-                                                       errorMessage));
+                gf.setContents(Utils::TemplateEngine::processText(&nested, QString::fromUtf8(reader.data()),
+                                                                  errorMessage));
                 if (!errorMessage->isEmpty()) {
                     *errorMessage = QCoreApplication::translate("ProjectExplorer::JsonWizard", "When processing \"%1\":<br>%2")
                             .arg(sourcePath, *errorMessage);