[lldb] Emit TypeOption flags correctly as ULEB (#227399)

A formatter's flags are loaded as ULEB:

```cpp
uint64_t flags = extractor.getULEB128(cursor);
```

This change updates formatter_bytecode.py to emit the flags as ULEB as
well.

Assisted-by: claude
GitOrigin-RevId: 0767d2351b27b5774ef205ea8143445231476026