[functional][y][epic] Introduce relevant installation validation test modules
We have a lot of different scenarios, where we validate the setup using same or similar set of test suites, which indirectly assure functional properties of the system, but is not most efficient way.
For example, in INSTALL_ONLY test suites we only check that system can boot, which is already good, but misses validation of the part of the system which is different to the "default".
Could of examples: GPT test suite doesn't check partitioning table,
USBintstall should validate the only difference which is repo from mounted usb
- All INSTALL_ONLY scenarios have relevant validation test module(s) for specific scenario enabled
- Default set of test modules (x11 and console tests) is executed only for some scenarios and relevant test modules are implemented to assure functional properties of the system