debugger: Do not include Rust in default value for sourceLanguages (CodeLLDB config) (#33670)

- **debugger: Update exception breakpoints list on capability update**
- **Do not prefill codelldb sourcelanguages by default**

Release Notes:

- debugger: CodeLLDB no longer enables pretty-printers for Rust by
default. This fixes pretty-printers for C++. This is a breaking change
for user-defined debug scenarios from debug.json; in order to enable
Rust pretty printing when using CodeLLDB, add `"sourceLanguages":
["rust"]` to your debug configuration. This change does not affect
scenarios automatically inferred by Zed.

---------

Co-authored-by: Anthony Eid <anthony@zed.dev>

crates/debugger_tools/src/dap_log.rs

@@ -434,9 +434,14 @@ impl LogStore {
 
     fn clean_sessions(&mut self, cx: &mut Context<Self>) {
         self.projects.values_mut().for_each(|project| {
-            project
-                .debug_sessions
-                .retain(|_, session| !session.is_terminated);
+            let mut allowed_terminated_sessions = 10u32;
+            project.debug_sessions.retain(|_, session| {
+                if !session.is_terminated {
+                    return true;
+                }
+                allowed_terminated_sessions = allowed_terminated_sessions.saturating_sub(1);
+                allowed_terminated_sessions > 0
+            });
         });
 
         cx.notify();