Specify what happens when builtin methods operate recursively on cyclic structures

Creating a cyclic structure is allowed, even with recursion disabled. But builtin methods can perform their own recursion over a hierarchical structure. We should specify whether implementations are obligated to handle this case gracefully, and whether gracefully means failing, or succeeding with a well-defined behavior, or either.

```
a = []
a.append(a)
print(a) # or str, or repr
```

See also bazelbuild/bazel#4295 for the Java interpreter specifically.

Review how print, str, and repr behave for the cyclic structure in the example, and compare the Java interpreter discussed in bazelbuild/bazel#4295. Resolve whether implementations must handle such recursion and define whether graceful handling means failure, a specified result, or either.

Written by the indexing model from the issue text.