Support elevation on machines other than x86_64.

[yuravk]

I. Distros elevation path:

• from CentOS7 to release 8:
  • almalinux: x86_64 aarch64 ppc64le
  • centos: x86_64 aarch64 ppc64le
  • eurolinux: x86_64 aarch64
  • oraclelinux: x86_64 aarch64
  • rocky: x86_64 aarch64
• from release 8 to 9:
  • almalinux: x86_64 aarch64 ppc64le s390x
  • centos: x86_64 aarch64 ppc64le
  • eurolinux: x86_64 aarch64
  • oraclelinux: -
  • rocky: x86_64 aarch64

RT and NFV repositories on CentOS and AlmaLinux are only available for x86_64 RT repository on RockyLinux is only available for x86_64

II. Vendors availability on architectures map:

vendor/arch  x86_64  aarch64  ppc64le  s380x

docker-ce
7              +       +        +
8              +       +        +
9              +       +        +
epel
7              +       +        +
8              +       +        +        +
9              +       +        +        +
imunify        +
kernelcare
7              +       +
8              +       +
9              +       +
mariadb
7              +       +
8              +       +
9              +       +
microsoft      +
nginx
7              +       +        +
8              +       +                 +
9              +       +                 +
postgresql
7              +       +        +
8              +       +        +
9              +       +
pgdg17
7              +       +
8              +       +
9              +       +

III. Back kernelcare vendor support for upgrades from 8 to 9