fix: Fix formatting requests hanging when r-a is still starting

The reason for that was that we were calculating the crate defmaps
of the file we are saving by accident causing us to get stuck waiting
on their expensive computation, while we only need the relevant crate
id.

crates/rust-analyzer/src/cargo_target_spec.rs

@@ -118,11 +118,7 @@ impl CargoTargetSpec {
         global_state_snapshot: &GlobalStateSnapshot,
         file_id: FileId,
     ) -> Result<Option<CargoTargetSpec>> {
-        let crate_id = match &*global_state_snapshot.analysis.crate_for(file_id)? {
-            &[crate_id, ..] => crate_id,
-            _ => return Ok(None),
-        };
-        let (cargo_ws, target) = match global_state_snapshot.cargo_target_for_crate_root(crate_id) {
+        let (cargo_ws, target) = match global_state_snapshot.cargo_target_for_file_id(file_id) {
             Some(it) => it,
             None => return Ok(None),
         };