use VectorAccess in CastRawNode

...in/src/com/oracle/truffle/r/nodes/builtin/base/AsRaw.java

...cle/truffle/r/nodes/builtin/casts/PipelineToCastNode.java

...src/com/oracle/truffle/r/nodes/unary/CastIntegerNode.java

...des/src/com/oracle/truffle/r/nodes/unary/CastRawNode.java

...le/truffle/r/runtime/data/nodes/FastPathVectorAccess.java

...est/src/com/oracle/truffle/r/test/ExpectedTestOutput.test

...com/oracle/truffle/r/test/builtins/TestBuiltin_asraw.java

.../com/oracle/truffle/r/test/builtins/TestMiscBuiltins.java

.../oracle/truffle/r/test/library/fastr/TestJavaInterop.java