redhat/configs: enable CONFIG_SQUASHFS_ZSTD which is already enabled in Fedora 34
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1998953
Kdump will use ZSTD as the default method for initrd squashfs compression. It is helpful for reducing the vmcore dump and read time consumption while keeping a good compression ratio on machines with large memories. Fedora has already enabled CONFIG_SQUASHFS_ZSTD, this patch enables CONFIG_SQUASHFS_ZSTD for RHEL by removing configs/ark/generic/CONFIG_SQUASHFS_ZSTD and moving configs/fedora/generic/CONFIG_SQUASHFS_ZSTD to configs/common/generic.
Signed-off-by: Tao Liu ltao@redhat.com