debugger beta: Fix gdb/delve JSON data conversion from New Session Modal (#31501)

test that check's that each conversion works properly based on the
adapter's config validation function. 

Co-authored-by: Zed AI \<ai@zed.dev\>

Release Notes:

- debugger beta: Fix bug where Go/GDB configuration's wouldn't work from
NewSessionModal

crates/dap_adapters/src/gdb.rs

@@ -26,10 +26,12 @@ impl DebugAdapter for GdbDebugAdapter {
 
         match &zed_scenario.request {
             dap::DebugRequest::Attach(attach) => {
+                obj.insert("request".into(), "attach".into());
                 obj.insert("pid".into(), attach.process_id.into());
             }
 
             dap::DebugRequest::Launch(launch) => {
+                obj.insert("request".into(), "launch".into());
                 obj.insert("program".into(), launch.program.clone().into());
 
                 if !launch.args.is_empty() {

crates/dap_adapters/src/go.rs

@@ -307,10 +307,14 @@ impl DebugAdapter for GoDebugAdapter {
         let mut args = match &zed_scenario.request {
             dap::DebugRequest::Attach(attach_config) => {
                 json!({
+                    "request": "attach",
+                    "mode": "debug",
                     "processId": attach_config.process_id,
                 })
             }
             dap::DebugRequest::Launch(launch_config) => json!({
+                "request": "launch",
+                "mode": "debug",
                 "program": launch_config.program,
                 "cwd": launch_config.cwd,
                 "args": launch_config.args,

crates/dap_adapters/src/php.rs

@@ -47,13 +47,6 @@ impl PhpDebugAdapter {
         })
     }
 
-    fn validate_config(
-        &self,
-        _: &serde_json::Value,
-    ) -> Result<StartDebuggingRequestArgumentsRequest> {
-        Ok(StartDebuggingRequestArgumentsRequest::Launch)
-    }
-
     async fn get_installed_binary(
         &self,
         delegate: &Arc<dyn DapDelegate>,
@@ -101,7 +94,7 @@ impl PhpDebugAdapter {
             envs: HashMap::default(),
             request_args: StartDebuggingRequestArguments {
                 configuration: task_definition.config.clone(),
-                request: self.validate_config(&task_definition.config)?,
+                request: <Self as DebugAdapter>::validate_config(self, &task_definition.config)?,
             },
         })
     }
@@ -303,6 +296,13 @@ impl DebugAdapter for PhpDebugAdapter {
         Some(SharedString::new_static("PHP").into())
     }
 
+    fn validate_config(
+        &self,
+        _: &serde_json::Value,
+    ) -> Result<StartDebuggingRequestArgumentsRequest> {
+        Ok(StartDebuggingRequestArgumentsRequest::Launch)
+    }
+
     fn config_from_zed_format(&self, zed_scenario: ZedDebugConfig) -> Result<DebugScenario> {
         let obj = match &zed_scenario.request {
             dap::DebugRequest::Attach(_) => {