Fix Whatever curry QAST::Block migration in stmt mods
Fix Whatever curry QAST::Block migration in stmt mods

Fixes R#1550 https://github.com/rakudo/rakudo/issues/1550

An ealier fix[^1] for curry migration added `statement_id`
annotation to whatever curries, to effect migration of their
QAST::Blocks in certain cases. However, `in_stmt_mod`
annotation is also required, to prevent that migration when the
curry is present as part of the statement modifier topic.

[1] https://github.com/rakudo/rakudo/commit/1ee89b54074e80c0753a120d6

lucasbuchala/rakudo,nbrown/rakudo,rakudo/rakudo,tony-o/rakudo,labster/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,salortiz/rakudo,softmoth/rakudo,lucasbuchala/rakudo,tony-o/rakudo,tbrowder/rakudo,labster/rakudo,softmoth/rakudo,labster/rakudo,Gnouc/rakudo,nbrown/rakudo,salortiz/rakudo,lucasbuchala/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,nbrown/rakudo,labster/rakudo,tony-o/rakudo,nbrown/rakudo,lucasbuchala/rakudo,salortiz/rakudo,rakudo/rakudo,Gnouc/rakudo,rakudo/rakudo,tbrowder/rakudo,labster/rakudo,tbrowder/rakudo,tbrowder/rakudo,tony-o/rakudo,salortiz/rakudo,tony-o/rakudo,lucasbuchala/rakudo,nbrown/rakudo,Gnouc/rakudo,tbrowder/rakudo,tony-o/rakudo,Gnouc/rakudo,rakudo/rakudo,softmoth/rakudo,softmoth/rakudo,salortiz/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,nbrown/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,softmoth/rakudo