lsp: Revert URL type change (#13193)

This reverts URI changes made in
https://github.com/zed-industries/zed/pull/12928 while keeping the perf
goodies in tact. We should keep an eye out for
https://github.com/gluon-lang/lsp-types/issues/284
Fixes: https://github.com/zed-industries/zed/issues/13135
Fixes: https://github.com/zed-industries/zed/issues/13131
Release Notes:

- N/A

crates/copilot/src/request.rs

@@ -102,7 +102,7 @@ pub struct GetCompletionsDocument {
     pub tab_size: u32,
     pub indent_size: u32,
     pub insert_spaces: bool,
-    pub uri: lsp::RawUri,
+    pub uri: lsp::Url,
     pub relative_path: String,
     pub position: lsp::Position,
     pub version: usize,