[processing] Don't replace " with ' when handling layer paths

Since netcdf, and possibly other gdal drivers, use layer uris
of the format NETCDF:"/tmp/test.nc":var1 we can't safely
remove or reformat these quotations.

src/core/processing/qgsprocessingutils.cpp

@@ -295,7 +295,6 @@ QString QgsProcessingUtils::normalizeLayerSource( const QString &source )
 {
   QString normalized = source;
   normalized.replace( '\\', '/' );
-  normalized.replace( '"', QLatin1String( "'" ) );
   return normalized.trimmed();
 }
 

tests/src/analysis/testqgsprocessing.cpp

@@ -682,7 +682,7 @@ void TestQgsProcessing::compatibleLayers()
 void TestQgsProcessing::normalizeLayerSource()
 {
   QCOMPARE( QgsProcessingUtils::normalizeLayerSource( "data\\layers\\test.shp" ), QString( "data/layers/test.shp" ) );
-  QCOMPARE( QgsProcessingUtils::normalizeLayerSource( "data\\layers \"new\"\\test.shp" ), QString( "data/layers 'new'/test.shp" ) );
+  QCOMPARE( QgsProcessingUtils::normalizeLayerSource( "data\\layers \"new\"\\test.shp" ), QString( "data/layers \"new\"/test.shp" ) );
 }
 
 void TestQgsProcessing::context()