[GR-2798] Fix attrs handling in as.vector and other smaller fixes.

...rc/com/oracle/truffle/r/engine/RRuntimeASTAccessImpl.java

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

...n/src/com/oracle/truffle/r/nodes/builtin/base/DoCall.java

...acle/truffle/r/nodes/builtin/base/NumericalFunctions.java

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

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

.../oracle/truffle/r/nodes/attributes/GetAttributesNode.java

...rc/com/oracle/truffle/r/nodes/function/RCallBaseNode.java

...truffle/r/nodes/function/RCallBaseNodeWrapperFactory.java

...es/src/com/oracle/truffle/r/nodes/function/RCallNode.java

...com/oracle/truffle/r/nodes/function/RCallSpecialNode.java

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

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

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

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

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

...acle/truffle/r/nodes/unary/ScalarUnaryArithmeticNode.java

...time/src/com/oracle/truffle/r/runtime/data/RPairList.java

...src/com/oracle/truffle/r/runtime/ops/UnaryArithmetic.java

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