TASK/CCT-296: Remove meson configuration for older versions of insights

[grunwmar]

[reopened]
We change the build to meson, and agree to use the main branch for the latest release.

The meson configuration still has ancient parts for configure insights-client for older versions of RHEL (6,7), which at this point are not needed to be in that branch.

Done Criteria:

• There is not unused code in meson build files (like cron configuration)

---

My jobs:

• I iterated meson files and found unused parts
• I removed unnecessary conditions from these
• I removed unused data/cron directory from the project due to previous point, I also iterated makefiles and did similar changes as in meson files to prevent errors
• i removed data/cron from configure.ac
• i also edited /meson.build file and took out required: false attribute from dependency() for systemd

As I was mentally more or less limited (words from Diablo II "Not enough manna." quite fits) for some months I am now very unconfident and unsure, so every notes, points on this pull request, even smallest details, are more then welcome.

[ptoscano]

/packit build

[ptoscano]

Thanks for the changes! They generally LGTM.

Would you please amend the commit to mention that you are making systemd mandatory, and dropping the support for non-systemd configurations (such as the cron file); also, the task ID can be in its own like to avoid filling the first line of the commit message.

I suggest something on the lines of:

feat: drop support for non-systemd configuration

Make systemd mandatory, and drop support for non-systemd configurations
such as the cron file.

Card ID: CCT-296