Fix remote clients unable to query custom, lsp_ext, commands (#27775)

Closes https://github.com/zed-industries/zed/issues/20583
Closes https://github.com/zed-industries/zed/issues/27133

A preparation for rust-analyzer's LSP tasks fetching, ensures all remote
clients are able to query custom, lsp_ext, commands.

Release Notes:

- Fixed remote clients unable to query custom, lsp_ext, commands

crates/editor/src/test.rs

@@ -14,6 +14,8 @@ use gpui::{
 use project::Project;
 use util::test::{marked_text_offsets, marked_text_ranges};
 
+pub use crate::rust_analyzer_ext::expand_macro_recursively;
+
 #[cfg(test)]
 #[ctor::ctor]
 fn init_logger() {