Debugger: Add stop on entry support to debug adapter configs (#27942)

This PR adds passing in `stop_on_entry` to debug configs in debug.json
instead of going through initialization args.

This has two benefits:

1. It's more streamlined to a user since every internal adapter supports
`stop_on_entry` for launch requests and Go's adapter supports it for
attach requests too.
2. It will allow @osiewicz `NewSesssionModal` PR to use this field for
the stop on entry checkbox.

Release Notes:

- N/A

crates/dap_adapters/src/php.rs

@@ -118,6 +118,7 @@ impl DebugAdapter for PhpDebugAdapter {
                 json!({
                     "program": launch_config.program,
                     "cwd": launch_config.cwd,
+                    "stopOnEntry": config.stop_on_entry,
                 })
             }
         }