NSFS | NC | Symlinks should contain a relative path

[naveenpaul1]

Explain the changes

1. Symling target path is changed to relative path (../accounts/account_name.json)

Issues: Fixed #xxx / Gap #xxx

1. Symlinks under "s3-config/access_keys" should contain a relative path rather absolute path #7914

Testing Instructions:

1. create account and check the symlink should have relative path instead of absolute path

root:access_keys# ls -lrt access_keys/
total 8
lrwxrwxrwx. 1 root root 29 Mar 20 12:36 kuDO2k8ahqvrju8clh2P.symlink -> ../accounts/acc_symlink1.json

• Doc added/updated
• Tests added