[CPDEV-94486] Add sysctl and audit rules validation

[ilia1243]

Description

• Need to add validation of kernel parameters and audit rules.

Fixes #42

Solution

• Added validation of already configured sysctl parameters and audit rules during the install procedure.
  If they are actual, the configuration is skipped.
• After Test ci install #331 we no longer need reboot before configuring of sysctl.
  Reboot and verify_system now happen after configuring of sysctl.
  Added validation that sysctl parameters are still actual after reboot.
• Added PaaS checks of sysctl parameters and audit rules.

Test Cases

TestCase 1

Double installation skips configuration of kernel parameters and audit rules.

Steps:

1. Install the cluster, and then run install procedure to reinstall the cluster.

Results:

Before	After
sysctl parameters and audit rules are always reconfigured	sysctl parameters and audit rules are not reconfigured during re-installation

TestCase 2

PaaS check of kernel parameters and audit rules.

Steps:

1. Install the cluster, and run check_paas

ER: new checks 231 and 232 are successfull

2. Change sysctl parameters or audit rules in cluster.yaml
3. Run check_paas

ER: 231 or 232 checks fail.

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Integration CI passed
• Unit tests. If Yes list of new/changed tests with brief description
• There is no merge conflicts

Unit tests

test_audit.py - audit.configure() now returns list of rules. Corresponding test is updated.

[shmo1218]

The doc review is done.