BUG: solverInfo: ensure access to initial residual fields (#1452)

Prior to the commit, initial residual fields were registered by
the `setResidualField()` function of a linear solver with a field name
prefixed by `residual:`. However, `solverInfo` FO could only access to
the initial residual fields prefixed by `initialResidual:`.

Due to this discrepancy, using `solverInfo` FO with `writeResidualFields=true`
option was resulting in empty residual fields to be output.

src/OpenFOAM/matrices/lduMatrix/solvers/PBiCG/PBiCG.C

@@ -105,7 +105,7 @@ Foam::solverPerformance Foam::PBiCG::solve
     (
         ConstPrecisionAdaptor<scalar, solveScalar>(rA)(),
         fieldName_,
-        false
+        true
     );
 
     // --- Calculate normalisation factor

src/OpenFOAM/matrices/lduMatrix/solvers/PCG/PCG.C

@@ -104,7 +104,7 @@ Foam::solverPerformance Foam::PCG::scalarSolve
     (
         ConstPrecisionAdaptor<scalar, solveScalar>(rA)(),
         fieldName_,
-        false
+        true
     );
 
     // --- Calculate normalisation factor

src/OpenFOAM/matrices/lduMatrix/solvers/smoothSolver/smoothSolver.C

@@ -140,7 +140,7 @@ Foam::solverPerformance Foam::smoothSolver::solve
             (
                 ConstPrecisionAdaptor<scalar, solveScalar>(residual)(),
                 fieldName_,
-                false
+                true
             );
 
             // Calculate residual magnitude