lsp: Remove reinstall, update config (#18318)

Release Notes:

- Fixed overriding the path of a language server binary for all language
servers. `{"lsp":{"<lsp-name>":{"binary":{"path": "_"}}}}` will now work
for all language servers including those defined by extensions.
- (breaking change) To disable finding lsp adapters in your path, you
must now specify
`{"lsp":{"<lsp-name>":{"binary":{"ignore_system_version": true}}}}`.
Previously this was `{"lsp":{"<lsp-name>":{"binary":{"path_lookup":
false}}}}`. Note that this setting still does not apply to extensions.
- Removed automatic reinstallation of language servers. (It mostly
didn't work)

---------

Co-authored-by: Mikayla <mikayla@zed.dev>

crates/project/src/project.rs

@@ -3958,14 +3958,6 @@ impl Project {
         self.lsp_store.read(cx).supplementary_language_servers()
     }
 
-    pub fn language_server_adapter_for_id(
-        &self,
-        id: LanguageServerId,
-        cx: &AppContext,
-    ) -> Option<Arc<CachedLspAdapter>> {
-        self.lsp_store.read(cx).language_server_adapter_for_id(id)
-    }
-
     pub fn language_server_for_id(
         &self,
         id: LanguageServerId,