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/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(_) => {