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_settings.rs

@@ -55,7 +55,7 @@ pub struct NodeBinarySettings {
     pub npm_path: Option<String>,
     /// If disabled, zed will download its own copy of node.
     #[serde(default)]
-    pub disable_path_lookup: Option<bool>,
+    pub ignore_system_version: Option<bool>,
 }
 
 #[derive(Clone, Debug, Default, Serialize, Deserialize, JsonSchema)]
@@ -143,7 +143,7 @@ const fn true_value() -> bool {
 pub struct BinarySettings {
     pub path: Option<String>,
     pub arguments: Option<Vec<String>>,
-    pub path_lookup: Option<bool>,
+    pub ignore_system_version: Option<bool>,
 }
 
 #[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]