[GR-4776] Change .fastr.interop builtin names.

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

...om/oracle/truffle/r/nodes/builtin/fastr/FastRInterop.java

...cle/truffle/r/nodes/builtin/methods/R/methods_overrides.R

com.oracle.truffle.r.pkgs/graalvm/data/handler.fr

com.oracle.truffle.r.pkgs/rJava/R/rj.R

com.oracle.truffle.r.pkgs/rJava/tests/testthat/testArrays.R

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

.../com/oracle/truffle/r/test/library/fastr/TestInterop.java

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

....test/src/com/oracle/truffle/r/test/tck/FastRTckTest.java