ShellPkg/ShellProtocol.c: Don't overwrite Status in InternalShellExecuteDevicePath

ShellPkg/ShellProtocol.c: Don't overwrite Status in InternalShellExecuteDevicePath

Due to the ASSERT_EFI_ERROR, this patch is necessary only to ensure specified
behaviour in RELEASE builds.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Brendan Jackman <Brendan.Jackman@arm.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Jaben Carsey <Jaben.carsey@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15181 6f19259b-4bc3-4df7-8a09-765794883524