Introduce ConditionVersion (#36468)

Add a new condition which can check against systemd version.

        $ systemctl --version
        systemd 258 (258~devel-g53ca5f6)

        $ systemd-analyze condition 'ConditionVersion=systemd>255'
        test.service: ConditionVersion=>255 succeeded.

        $ systemd-analyze condition 'ConditionVersion=systemd>260'
        test.service: ConditionVersion=>260 failed.

        $ systemd-analyze condition 'ConditionVersion=systemd>=258'
        test.service: ConditionVersion=>=258 succeeded.

        $ systemd-analyze condition 'ConditionVersion=systemd>=257.1'
        test.service: ConditionVersion=>=257.1 succeeded.

        $ uname -r
        6.12.13-200.fc41.aarch64

        $ systemd-analyze condition 'ConditionVersion=kernel > 4.4'
        test.service: ConditionVersion=kernel > 4.4 succeeded.

        $ systemd-analyze condition 'ConditionVersion=kernel > 6.20'
        test.service: ConditionVersion=kernel > 6.20 failed.

        $ systemd-analyze condition 'ConditionVersion=kernel < 9.0'
        test.service: ConditionVersion=kernel < 9.0 succeeded.