Add graphs for cpu/memory in kibana

• run tests with cpu/mem measurements for some commits in a specific host.
• create test_..._resources visualizations for each test, showing cpu/mem.
• rename current visualizations adding _time in the end of their names.
• configure dashboard to show _time and _resources side by side for each test.
• reflect all changes in scripts directory.
• document how to add graphs and update the dashboard.
• limit graphs to N last measurements and/or date range: #8863