Improve Linux panic reporting (#22202)

- [x] Upload separate debug symbols for Linux binaries to DigitalOcean
- [x] Send raw offsets with panic report JSON on Linux
- [x] Update `symbolicate` script to handle Linux crashes
- [x] Demangle backtraces 🎉 
- [x] Check that it works
- [x] Improve deduplication (?)
 
Release Notes:

- N/A

---------

Co-authored-by: Conrad <conrad@zed.dev>

crates/telemetry_events/src/telemetry_events.rs

@@ -269,6 +269,7 @@ pub struct Panic {
     pub app_version: String,
     /// Zed release channel (stable, preview, dev)
     pub release_channel: String,
+    pub target: Option<String>,
     pub os_name: String,
     pub os_version: Option<String>,
     pub architecture: String,