t/op/goto.t: Split into two files, one focused on 'goto &NAME'

[jkeenan]

This pull request consolidates into a new test file all tests formerly found in t/op/goto.t that exercise the goto &NAME functionality. These should be outside the scope of the current (5.42) deprecation of aspects of goto LABEL (GH #23618) now scheduled for 5.44. If we have done that successfully, then during the 5.43 dev cycle we shouldn't see any instances of this warning (or of its fatalization replacement).

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• This set of changes does not require a perldelta entry.

[tonycoz]

This test left in op/goto.t is a goto sub test:

sub TIESCALAR { bless [pop] }
sub FETCH     { $_[0][0] }
tie my $t, "", sub { "cluck up porridge" };
is eval { sub { goto $t }->() }//$@, 'cluck up porridge',
  'tied arg returning sub ref';

I agree that goto-sub.t would be a better name.

[jkeenan]

This test left in op/goto.t is a goto sub test:

sub TIESCALAR { bless [pop] }
sub FETCH     { $_[0][0] }
tie my $t, "", sub { "cluck up porridge" };
is eval { sub { goto $t }->() }//$@, 'cluck up porridge',
  'tied arg returning sub ref';

I agree that goto-sub.t would be a better name.

Revised; please review.

[tonycoz]

This looks fine, though it needs squashing

[jkeenan]

This looks fine, though it needs squashing

Thanks. Will first rebase on blead, then squash, then push.