vim: Copy comment to new lines with o/O (#19766)

Co-Authored-By: Kurt Wolf <kurtwolfbuilds@gmail.com>

Closes: #4691

Closes #ISSUE

Release Notes:

- vim: o/O now respect `extend_comment_on_newline`

crates/vim/test_data/test_o_comment.json

@@ -0,0 +1,8 @@
+{"SetOption":{"value":"filetype=rust"}}
+{"Put":{"state":"// helloˇ\n"}}
+{"Key":"o"}
+{"Get":{"state":"// hello\n// ˇ\n","mode":"Insert"}}
+{"Key":"x"}
+{"Key":"escape"}
+{"Key":"shift-o"}
+{"Get":{"state":"// hello\n// ˇ\n// x\n","mode":"Insert"}}