[perl #123083] [BUG] `anon enum` should work the same way as `enum ::`, and `my %e = enum ::` should work too in Rakudo

[Tobias Leich via RT]

Patch: https://github.com/rakudo/rakudo/commit/8f4e908869
Test: https://github.com/perl6/roast/commit/f47d1dab1b

Closing ticket.