Symplify tests

[thiagoftsm]

Summary

This PR brings changes in the tester source code that will be used in netdata/netdata.

Test Plan

1. Get binaries according to your C library from this link and extract them inside a directory, for example: ../artifacts. You can also get everything for glibc [here](UPLOAD FILE WITH ALL BINARIES TO SIMPLIFY REVIEWERS).

2. Extract them running:

   $ for i in `ls *.zip`; do unzip $i; rm .gitkeep ; rm $i; done
   $ for i in `ls *.xz`; do tar -xf $i; rm $i* ; done

3. Compile branch an run the following tests:

   # make clean; make tester
   # for i in `seq 0 3`; do ./kernel/legacy_test --netdata-path ../artifacts --content --networkviewer --iteration 1 --pid $i --log-path file_pid$i.txt; done

4. Every test should ends with Success, unless you do not have a specific target (function) available.

Additional information

This PR was tested on:

Linux Distribution	Environment	Kernel Version	Real Parent	Parent	All PIDs	Without PIDs
Slackware current	Bare metal	6.6.15	slackware_pid0.txt	slackware_pid1.txt	slackware_pid2.txt	slackware_pid3.txt
Arch Linux	Libvirt	6.7.4-arch1-1	arch_pid0.txt	arch_pid1.txt	arch_pid2.txt	arch_pid3.txt
Ubuntu 23.04	Libvirt	6.2.0-39-generic	ubuntu_pid0.txt	ubuntu_pid1.txt	ubuntu_pid2.txt	ubuntu_pid3.txt
Ubuntu 22.04	libvirt	5.15.0-76-generic	file_pid0.txt	file_pid1.txt	file_pid2.txt	file_pid3.txt
Alma 9	Libvirt	5.14.0-362.18.1.el9_3.x86_64	arch_pid0.txt	arch_pid1.txt	arch_pid2.txt	arch_pid3.txt
Debian 11	Libvirt	5.10.0-22-amd64	debian_pid0.txt	debian_pid1.txt	debian_pid2.txt	debian_pid3.txt
Alma 8	Libvirt	4.18.0-513.11.1.el8_9.x86_64	alma_pid0.txt	alma_pid1.txt	alma_pid2.txt	alma_pid3.txt
Slackware current	Qemu	4.14.290	slackware_4_14_pid0.txt	slackware_4_14_pid1.txt	slackware_4_14_pid2.txt	slackware_4_14_pid3.txt
CentOS 7.9	Libvirt	3.10.0-1160.108.1.el7.x86_64	centos_3_10_pid0.txt	centos_3_10_pid1.txt	centos_3_10_pid2.txt	centos_3_10_pid3.txt