chore: Improve dev build startup time (#11692)

RustEmbed repeatedly compiled regexes for handling of
'include='/'exclude' statements in a hot loop, which caused each call to
Assets::iter() to take 600ms. Since it is being called twice on our
startup path, that alone contributed over a second to startup time in
debug builds. I've filed a PR with them
https://github.com/pyrossh/rust-embed/pull/244 which brings down the
time for a single iter() call to 6ms.

Release Notes:

- N/A

crates/languages/Cargo.toml

@@ -26,7 +26,7 @@ node_runtime.workspace = true
 project.workspace = true
 regex.workspace = true
 rope.workspace = true
-rust-embed = "8.2.0"
+rust-embed.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 settings.workspace = true