[Subtask] Refactor DorisContainer to avoid unused GenericContainer creation

### Describe the subtask

Refactor to avoid creating an unused through the call. The current implementation extends but never uses the parent class's , which adds unnecessary overhead and makes the compose-based container indirectly depend on BaseContainer's image semantics.

### Parent issue

#10032

### Background

In PR #10046, Copilot suggested refactoring to avoid creating the unused . However, this was deferred as it's a larger architectural change beyond the scope of the PR.

### Proposed solution

Consider one of the following approaches:
1. Remove the extension and create a compose-specific base/contract
2. Refactor to support both single-container and compose-based implementations
3. Create a new base class

### Benefits

- Cleaner architecture
- Reduced overhead
- Better separation of concerns
- Easier to maintain and extend