The files on the mounted point are not deleted after the TTL expires

[liangyihan]

Describe the bug
Create a bucket named "test2" with a TTL (Time To Live) of 1 minute. Upload files into the bucket. After the TTL expires, verify that the files no longer exist inside the bucket. However, the files on the mounted point are still present.

upload file
curl -F file=@Readme.txt "http://10.xxx.xx.x:9283/home/hdpu/lyh/mount_dir/test2/20240424/Readme1.txt"
curl -F file=@Readme.txt "http://10.xxx.xx.x:9283/home/hdpu/lyh/mount_dir/test2/20240424/Readme2.txt"
curl -F file=@Readme.txt "http://10.xxx.xx.x:9283/home/hdpu/lyh/mount_dir/test2/20240424/Readme3.txt"

System Setup

• List the command line to start "weed master", "weed volume", "weed filer", "weed s3", "weed mount".

./weed -logdir=/data/obs/hdd/log/master master -mdir=/data/obs/ssd/data/master -peers=10.xxx.xx.x:9666 -ip=10.xxx.xx.x -port=9666 -defaultReplication=000 -volumePreallocate -volumeSizeLimitMB=80

/weed -logdir=/data/obs/hdd/log/volume volume -index=leveldb -idleTimeout=30 -dir=/data/obs/ssd/data/volume,/data/obs/hdd/data/volume,/data/obs/warm/data/volume,/data/obs/cold/data/volume -disk=ssd,hdd,warm,cold -mserver=10.xxx.xx.x:9666 -dataCenter=dc -rack=rack1 -ip=10.xxx.xx.x -port=9189 -concurrentDownloadLimitMB=2048 -max=0

./weed -logdir=/data/obs/hdd/log/filer filer -master=10.xxx.xx.x:9666 -ip=10.xxx.xx.x -port=9283 -defaultReplicaPlacement=000 -maxMB=4 -s3 -s3.allowEmptyFolder -encryptVolumeData -s3.port=9383 -iam -iam.port=9483

./weed mount -cacheCapacityMB=0 -filer=10.xxx.xx.x:9283 -volumeServerAccess=filerProxy -dir=/home/hdpu/lyh/mount_dir/ -filer.path=/home/hdpu/lyh/mount_dir/

• OS version centos7
• output of weed version seaweedfs 3.15
• if using filer, show the content of filer.toml
  [cassandra]
  enabled = true
  keyspace = "seaweedfs"
  hosts = [
  "10.xxx.xx.x:9042",
  ]
  username = ""
  password = ""
  This changes the data layout. Only add new directories. Removing/Updating will cause data loss.
  superLargeDirectories = []
  Name of the datacenter local to this filer, used as host selection fallback.
  localDC = ""

Expected behavior
The files on the mounted point have been deleted.

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Additional context
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