Rollup merge of #149123 - Ayush1325:uefi-fs-size-fix, r=ChrisDenton

std: sys: fs: uefi: Fix FileAttr size

- The underlying file size is represented by file_size field. The size field is just the size of structure since it is a C DST.
- Fixes bug created in #148970

``@rustbot`` label +O-UEFI

Author: matthiaskrgr

library/std/src/sys/fs/uefi.rs

@@ -81,7 +81,7 @@ impl FileAttr {
         unsafe {
             Self {
                 attr: (*info.as_ptr()).attribute,
-                size: (*info.as_ptr()).size,
+                size: (*info.as_ptr()).file_size,
                 modified: uefi_fs::uefi_to_systemtime((*info.as_ptr()).modification_time),
                 accessed: uefi_fs::uefi_to_systemtime((*info.as_ptr()).last_access_time),
                 created: uefi_fs::uefi_to_systemtime((*info.as_ptr()).create_time),