do not create subclasses of Casts

...ltin/src/com/oracle/truffle/r/nodes/builtin/base/All.java

...ltin/src/com/oracle/truffle/r/nodes/builtin/base/Any.java

...tin/src/com/oracle/truffle/r/nodes/builtin/base/Bind.java

...src/com/oracle/truffle/r/nodes/builtin/base/ColMeans.java

.../src/com/oracle/truffle/r/nodes/builtin/base/ColSums.java

.../com/oracle/truffle/r/nodes/builtin/base/ColSumsBase.java

...cle/truffle/r/nodes/builtin/base/ConnectionFunctions.java

...m/oracle/truffle/r/nodes/builtin/base/DebugFunctions.java

.../oracle/truffle/r/nodes/builtin/base/IsTypeFunctions.java

.../com/oracle/truffle/r/nodes/builtin/base/LaFunctions.java

.../src/com/oracle/truffle/r/nodes/builtin/base/PMinMax.java

...c/com/oracle/truffle/r/nodes/builtin/base/Quantifier.java

...src/com/oracle/truffle/r/nodes/builtin/base/RowMeans.java

.../src/com/oracle/truffle/r/nodes/builtin/base/RowSums.java

...truffle/r/nodes/builtin/base/StartsEndsWithFunctions.java

...m/oracle/truffle/r/nodes/builtin/base/TraceFunctions.java

...m/oracle/truffle/r/nodes/builtin/base/WhichFunctions.java

...racle/truffle/r/nodes/builtin/base/infix/UpdateField.java

...acle/truffle/r/nodes/access/vector/ExtractVectorNode.java

.../r/nodes/access/vector/RecursiveExtractSubscriptNode.java