### Apache Airflow version

2.4.1

### What happened

When there are large number of dag files, lets say 10K and each takes sometime to parse,  dag_parser doesnt pick any newly created files till all 10k files are finished parsing

`if not self._file_path_queue:
                self.emit_metrics()
                self.prepare_file_path_queue()`

Above logic only adds new files to queue when queue is empty

### What you think should happen instead

Every loop of dag processor should pick new files and add into file for parsing queue

### How to reproduce

_No response_

### Operating System

All

### Versions of Apache Airflow Providers

_No response_

### Deployment

Docker-Compose

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

files_with_mtime = {}
        file_paths = []
        is_mtime_mode = list_mode == "modified_time"
        file_paths_recently_processed = []
        for file_path in self._file_paths:
            if is_mtime_mode:
                try:
                    files_with_mtime[file_path] = os.path.getmtime(file_path)
                except FileNotFoundError:
                    self.log.warning("Skipping processing of missing file: %s", file_path)
                    continue
                file_modified_time = timezone.make_aware(datetime.fromtimestamp(files_with_mtime[file_path]))
            else:
                file_paths.append(file_path)
                file_modified_time = None
            
            
            
            
            last_finish_time = self.get_last_finish_time(file_path)
            if (
                last_finish_time is not None
                and (now - last_finish_time).total_seconds() < self._file_process_interval
                and not (is_mtime_mode and file_modified_time and (file_modified_time > last_finish_time))
            ):
                file_paths_recently_processed.append(file_path)
        
        if is_mtime_mode:
            file_paths = sorted(files_with_mtime, key=files_with_mtime.get, reverse=True)
        elif list_mode == "alphabetical":