[GR-4537] Improve performance for writing tables to files.

...le/r/nodes/builtin/base/printer/ComplexVectorPrinter.java

...fle/r/nodes/builtin/base/printer/DoubleVectorPrinter.java

...e/truffle/r/nodes/builtin/base/printer/FormatMetrics.java

...le/r/nodes/builtin/base/printer/IntegerVectorPrinter.java

...cle/truffle/r/nodes/builtin/base/printer/ListPrinter.java

...le/r/nodes/builtin/base/printer/LogicalVectorPrinter.java

...ser/src/com/oracle/truffle/r/parser/ParserGeneration.java

...acle.truffle.r.parser/src/com/oracle/truffle/r/parser/R.g

...om/oracle/truffle/r/runtime/conn/DelegateRConnection.java

...racle/truffle/r/runtime/conn/DelegateReadRConnection.java

.../truffle/r/runtime/conn/DelegateReadWriteRConnection.java

...acle/truffle/r/runtime/conn/DelegateWriteRConnection.java

...rc/com/oracle/truffle/r/runtime/conn/FileConnections.java