[Backport] [Oracle GraalVM] [GR-66583] Backport to 23.1: Suspicious caching of asVarArgs in HostExecuteNode.doVarArgs()

[bulasevich]

This PR backports:

• [GR-66539] Fix varargs handling in HostExecuteNode. oracle/graal#11565

Conflicts: There were no conflicts.

Minor checkstyle fix: align lambda body and remove redundant empty comment line.

        HostAccess access = HostAccess.newBuilder(HostAccess.EXPLICIT)//
                        .targetTypeMapping(Value.class, Object[].class, (v) -> targetMappingEnabled.get() && v.isHostObject() && v.asHostObject() == testArray, (v) -> {
                            if (targetMappingEnabled.get()) {
                                return new Object[1];
                            } else {
                                throw new ClassCastException();
                            }
                        })//
                        .build();

Closes: #220