workspace: Rename "Discard" to "Discard Edits" in file conflict prompt (#55870)

When a file has unsaved edits and has also changed on disk, the conflict
prompt offered "Overwrite / Discard / Cancel". Both "Overwrite" and
"Discard" were directionally ambiguous, it wasn't clear whether the disk
contents or the buffer edits would be lost. "Discard Edits" makes it
explicit that the buffer edits are thrown away and the disk version is
reloaded.

Release Notes:

- Improved the file conflict prompt by renaming the "Discard" button to
"Discard Edits" to clarify that unsaved edits are discarded in favor of
the on-disk contents.

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

crates/workspace/src/pane.rs

@@ -2344,7 +2344,7 @@ impl Pane {
                         PromptLevel::Warning,
                         CONFLICT_MESSAGE,
                         None,
-                        &["Overwrite", "Discard", "Cancel"],
+                        &["Overwrite", "Discard Edits", "Cancel"],
                         cx,
                     )
                 })?;

crates/workspace/src/workspace.rs

@@ -12410,7 +12410,7 @@ mod tests {
         assert!(cx.has_pending_prompt());
 
         // Cancel saving item 3.
-        cx.simulate_prompt_answer("Discard");
+        cx.simulate_prompt_answer("Discard Edits");
         cx.executor().run_until_parked();
 
         // Item 3 is reloaded. There's a prompt to save item 4.