reuse the native format reader as much as possible for reading file footer

### Feature Description

**What the feature achieves:**
reuse the reader to avoid additional reader construction and fs access quotas

**Why this feature is needed:**
for cost save

### User Experience

**How users will use this feature:**
no explicit options.

- Configuration changes needed
- API changes
- Usage examples

### Hudi RFC Requirements

**RFC PR link:** (if applicable)
rfc-103

**Why RFC is/isn't needed:**
- Does this change public interfaces/APIs? (Yes/No)
- Does this change storage format? (Yes/No)
- Justification: