ShellPkg: Move SHELL_FREE_NON_NULL from ShellBase.h to ShellLib.h

ShellPkg: Move SHELL_FREE_NON_NULL from ShellBase.h to ShellLib.h

The more proper place for macro SHELL_FREE_NON_NULL is ShellLib.h
instead of ShellBase.h.

Modify Compress.c to resolve build failure due to this change.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>