Fix some edge-cases in vim visual delete (#12131)

Release Notes:

- vim: Fixed `shift-d` in visual and visual block mode.

crates/vim/test_data/test_visual_shift_d.json

@@ -0,0 +1,10 @@
+{"Put":{"state":"The ˇquick brown\nfox jumps over\nthe lazy dog\n"}}
+{"Key":"v"}
+{"Key":"down"}
+{"Key":"shift-d"}
+{"Get":{"state":"the ˇlazy dog\n","mode":"Normal"}}
+{"Put":{"state":"The ˇquick brown\nfox jumps over\nthe lazy dog\n"}}
+{"Key":"ctrl-v"}
+{"Key":"down"}
+{"Key":"shift-d"}
+{"Get":{"state":"Theˇ \nfox \nthe lazy dog\n","mode":"Normal"}}