Update reflink.rs from FICLONERANGE to FIDEDUPERANGE for data safety

IOCTL offers three key functions: FICLONE: This function duplicates entire files by sharing storage, without assessing content similarity. FICLONERANGE: This function allows for the cloning of specific byte ranges between files, also without verifying content similarity. FIDEDUPERANGE: This function conducts deduplication by comparing specified byte ranges, sharing storage only when the content is identical; differing ranges remain distinct. Among these, FIDEDUPERANGE is the only option that verifies the content of blocks prior to deduplication, making it the sole method that guarantees 100% safety for this process. Dedupe via IOCTL calls currently uses FICLONE. Which works but the issue is that its not 100% safe as FICLONE does not check file contents as it is for cloning not deduplication. So it clones blocks even if they are different. Hence the PR to fix this and close #293 Original request from @patrickwolf https://github.com/pkolaczk/fclones/issues/293#issue-2934844801 Suggestion on implementation from @zygo https://github.com/pkolaczk/fclones/issues/293#issuecomment-2744089865 PS: For full transparency my background is Python/C# and not Rust so I let Sonnet 3.7 help me with the PR