git: Make inline blame padding configurable (#33631)

Just like with diagnostics, adding a configurable padding to inline
blame

Release Notes:

- Added configurable padding to inline blame

---------

Co-authored-by: Cole Miller <cole@zed.dev>
Co-authored-by: Peter Tripp <petertripp@gmail.com>

crates/collab/src/tests/editor_tests.rs

@@ -3101,9 +3101,7 @@ async fn test_git_blame_is_forwarded(cx_a: &mut TestAppContext, cx_b: &mut TestA
     // Turn inline-blame-off by default so no state is transferred without us explicitly doing so
     let inline_blame_off_settings = Some(InlineBlameSettings {
         enabled: false,
-        delay_ms: None,
-        min_column: None,
-        show_commit_summary: false,
+        ..Default::default()
     });
     cx_a.update(|cx| {
         SettingsStore::update_global(cx, |store, cx| {