Make tests less noisy (#12463)

When running the tests for linux, I found a lot of benign errors getting
logged. This PR cuts down some of the noise from unnecessary workspace
serialization and SVG renders

Release Notes:

- N/A

crates/file_icons/src/file_icons.rs

@@ -38,11 +38,10 @@ impl FileIcons {
     pub fn new(assets: impl AssetSource) -> Self {
         assets
             .load("icons/file_icons/file_types.json")
-            .and_then(|file| {
-                serde_json::from_str::<FileIcons>(str::from_utf8(&file).unwrap())
-                    .map_err(Into::into)
-            })
-            .unwrap_or_else(|_| FileIcons {
+            .ok()
+            .flatten()
+            .and_then(|file| serde_json::from_str::<FileIcons>(str::from_utf8(&file).unwrap()).ok())
+            .unwrap_or_else(|| FileIcons {
                 stems: HashMap::default(),
                 suffixes: HashMap::default(),
                 types: HashMap::default(),