Compressed lz4 files are also copied in restored data dir

./xtrabackup --user=root --password='' --backup --target-dir=$HOME/dbbackup_PS8/full -S $HOME/PS230719_8_0_16_6_debug/socket.sock --datadir=$HOME/PS230719_8_0_16_6_debug/data --compress=lz4 --compress-threads=10 --parallel=10 --keyring_file_data=$HOME/PS230719_8_0_16_6_debug/keyring --xtrabackup-plugin-dir=$HOME/pxb_8_0_7_debug/lib/plugin 2>full_backup_$(date +"%d_%m_%Y")_log

./xtrabackup --decompress --parallel=10 --target-dir=$HOME/dbbackup_PS8/full 2>decompressfullbackuplog

./xtrabackup --prepare --target_dir=$HOME/dbbackup_PS8/full --keyring_file_data=$HOME/PS230719_8_0_16_6_debug/keyring --xtrabackup-plugin-dir=$HOME/pxb_8_0_7_debug/lib/plugin 2>&1 | tee prepare_full_backup_$(date +"%d_%m_%Y")_log

./xtrabackup --copy-back --target-dir=$HOME/dbbackup_PS8/full --datadir=$HOME/PS230719_8_0_16_6_debug/data --keyring_file_data=$HOME/PS230719_8_0_16_6_debug/keyring --xtrabackup-plugin-dir=$HOME/pxb_8_0_7_debug/lib/plugin 2>&1 | tee restore_full_backup_$(date +"%d_%m_%Y")_log

-rw-r----- 1 mchawla mchawla 12582912 Jul 29 13:12 undo_001
-rw-r----- 1 mchawla mchawla 12582912 Jul 29 13:12 undo_002
-rw-r----- 1 mchawla mchawla 50331648 Jul 29 13:12 ib_logfile0
-rw-r----- 1 mchawla mchawla 50331648 Jul 29 13:12 ib_logfile1
-rw-r----- 1 mchawla mchawla 12582912 Jul 29 13:12 ibdata1
-rw-r----- 1 mchawla mchawla 515 Jul 29 13:12 binlog.000030
-rw-r----- 1 mchawla mchawla 16 Jul 29 13:12 binlog.index
-rw-r----- 1 mchawla mchawla 424 Jul 29 13:12 backup-my.cnf.lz4
-rw-r----- 1 mchawla mchawla 329 Jul 29 13:12 binlog.000030.lz4
-rw-r----- 1 mchawla mchawla 869 Jul 29 13:12 xtrabackup_info.lz4
-rw-r----- 1 mchawla mchawla 45 Jul 29 13:12 binlog.index.lz4
-rw-r----- 1 mchawla mchawla 190 Jul 29 13:12 xtrabackup_tablespaces.lz4
-rw-r----- 1 mchawla mchawla 1230 Jul 29 13:12 ib_buffer_pool.lz4
-rw-r----- 1 mchawla mchawla 3510 Jul 29 13:12 ib_buffer_pool
drwxr-x--- 2 mchawla mchawla 4096 Jul 29 13:12 sys
-rw-r----- 1 mchawla mchawla 24117248 Jul 29 13:12 mysql.ibd
drwxr-x--- 2 mchawla mchawla 4096 Jul 29 13:12 mysql
drwxr-x--- 2 mchawla mchawla 4096 Jul 29 13:12 test
-rw-r----- 1 mchawla mchawla 306 Jul 29 13:12 xtrabackup_binlog_info.lz4
drwxr-x--- 2 mchawla mchawla 16384 Jul 29 13:12 performance_schema
-rw-r----- 1 mchawla mchawla 12582912 Jul 29 13:12 ibtmp1
drwxr-x--- 2 mchawla mchawla 4096 Jul 29 13:12 test_rocksdb
-rw-r----- 1 mchawla mchawla 513 Jul 29 13:12 xtrabackup_logfile.lz4
-rw-r----- 1 mchawla mchawla 2055352 Jul 29 13:12 mysql.ibd.lz4
-rw-r----- 1 mchawla mchawla 1214 Jul 29 13:12 xtrabackup_info
-rw-r----- 1 mchawla mchawla 18 Jul 29 13:12 xtrabackup_binlog_pos_innodb
-rw-r----- 1 mchawla mchawla 1 Jul 29 13:12 xtrabackup_master_key_id