Fix cmd+click find all references fallback not working in Vim mode (#10684)

Exclude go-to-definition links returned by LSP that points to the
current cursor position. This fixes #10392 . Related PR #9243 .

The previous implementation first performs go-to-definition, and if the
selected text covers the clicked position, it figures out that it is
already clicking on a definition, and should instead look for
references.

However, the selected range does not necessarily cover the clicked
position after clicking on a definition, as in VIM mode.

After the PR, if cmd+click on definitions, the definition links would be
an empty list, so no go-to-definition is performed, and
find-all-references is performed instead.

Release Notes:

- Fixed #10392 , now `cmd+click`ing to find all references works in vim
mode.

crates/editor/src/editor.rs

@@ -7745,7 +7745,13 @@ impl Editor {
                 .update(&mut cx, |editor, cx| {
                     editor.navigate_to_hover_links(
                         Some(kind),
-                        definitions.into_iter().map(HoverLink::Text).collect(),
+                        definitions
+                            .into_iter()
+                            .filter(|location| {
+                                hover_links::exclude_link_to_position(&buffer, &head, location, cx)
+                            })
+                            .map(HoverLink::Text)
+                            .collect::<Vec<_>>(),
                         split,
                         cx,
                     )