Issue 48377 - Update file name for LD_PRELOAD
    
    Bug Description:
    We ship versioned libjemalloc.so.2, but LD_PRELOAD still uses
    unversioned file name.
    
    Fix Description:
    Update LD_PRELOAD to use versioned .so name.
    
    https://pagure.io/389-ds-base/issue/48377
    
    Reviewed by: mreynolds (Thanks!)