NTO: Provide a way to override sysctl values already defined in /etc/sysctl

By default, TuneD doesn't override values users/administrators set in /etc/sysctl{.conf,.d}

directories. However, it already has a way of support this functionality by setting `reapply_sysctl = 0` in `/etc/tuned/tuned-main.conf` configuration file. Experience has show, this might actually be needed on NTO-level: https://bugzilla.redhat.com/show_bug.cgi?id=2039701

Enhance NTO to allow setting this variable in Tuned custom resources. The idea is to have something similar we already have for enabling debugging of TuneD by:

    operand:
      debug: true

i.e., add something like:

    operand:     
      tunedConfig: 
        reapply_sysctl: 0/false   # int/bool - discuss with TuneD maintainers