git: Display author not committer in git popover (#27628)

Display Author name/email instead of Committer name/email in git
popover.

Closes https://github.com/zed-industries/zed/issues/27625

Prior to v0.173.x, Zed displayed Author name. Regression introduced in:
- https://github.com/zed-industries/zed/pull/24593

Release Notes:

- git: Switch to displaying Git author instead of Git committer in Git
Blame popover.

crates/git_ui/src/git_panel.rs

@@ -3951,8 +3951,8 @@ impl GitPanelMessageTooltip {
 
                 let commit_details = editor::commit_tooltip::CommitDetails {
                     sha: details.sha.clone(),
-                    committer_name: details.committer_name.clone(),
-                    committer_email: details.committer_email.clone(),
+                    author_name: details.committer_name.clone(),
+                    author_email: details.committer_email.clone(),
                     commit_time: OffsetDateTime::from_unix_timestamp(details.commit_timestamp)?,
                     message: Some(editor::commit_tooltip::ParsedCommitMessage {
                         message: details.message.clone(),