chore: Fix several style lints (#17488)

It's not comprehensive enough to start linting on `style` group, but
hey, it's a start.

Release Notes:

- N/A

crates/collab/src/llm/authorization.rs

@@ -26,19 +26,16 @@ fn authorize_access_to_model(
         return Ok(());
     }
 
-    match provider {
-        LanguageModelProvider::Anthropic => {
-            if model == "claude-3-5-sonnet" {
-                return Ok(());
-            }
-
-            if claims.has_llm_closed_beta_feature_flag
-                && Some(model) == config.llm_closed_beta_model_name.as_deref()
-            {
-                return Ok(());
-            }
+    if provider == LanguageModelProvider::Anthropic {
+        if model == "claude-3-5-sonnet" {
+            return Ok(());
+        }
+
+        if claims.has_llm_closed_beta_feature_flag
+            && Some(model) == config.llm_closed_beta_model_name.as_deref()
+        {
+            return Ok(());
         }
-        _ => {}
     }
 
     Err(Error::http(

crates/collab/src/llm/db.rs

@@ -110,14 +110,12 @@ impl LlmDatabase {
             let (tx, result) = self.with_transaction(&f).await?;
             match result {
                 Ok(result) => match tx.commit().await.map_err(Into::into) {
-                    Ok(()) => return Ok(result),
-                    Err(error) => {
-                        return Err(error);
-                    }
+                    Ok(()) => Ok(result),
+                    Err(error) => Err(error),
                 },
                 Err(error) => {
                     tx.rollback().await?;
-                    return Err(error);
+                    Err(error)
                 }
             }
         };

crates/collab/src/llm/db/queries/providers.rs

@@ -82,7 +82,7 @@ impl LlmDatabase {
     pub async fn insert_models(&mut self, models: &[ModelParams]) -> Result<()> {
         let all_provider_ids = &self.provider_ids;
         self.transaction(|tx| async move {
-            model::Entity::insert_many(models.into_iter().map(|model_params| {
+            model::Entity::insert_many(models.iter().map(|model_params| {
                 let provider_id = all_provider_ids[&model_params.provider];
                 model::ActiveModel {
                     provider_id: ActiveValue::set(provider_id),