Fix 2 unit tests that are marked to be skipped during test execution

[przemyslavic]

Is your feature request related to a problem? Please describe.
We have two unit tests that have been skipped from testing for a long time.

• test_get_autoscaling_group_should_set_proper_values_to_model
  @pytest.mark.skip(reason='Rewrite this test regarding subnets')

• test_get_launch_configuration_should_set_proper_values_to_model
  @pytest.mark.skip(reason='Rewrite this test regarding security groups')

Describe the solution you'd like
Tests should be rewritten/ adjusted to current conditions and included in the test suite.

Describe alternatives you've considered
If these tests are of no use, they can be removed.

Additional context
It is important to fix this as test results are presented in the Text Exit Summary Report.

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DoD checklist

• Changelog updated
• COMPONENTS.md updated / doesn't need to be updated
• Schema updated / doesn't need to be updated
• Feature has automated tests
• Automated tests passed (QA pipelines)
  • apply
  • upgrade
• Idempotency tested
• Documentation added / updated / doesn't need to be updated
• All conversations in PR resolved
• Solution meets requirements and is done according to design doc
• Usage compliant with license
• Backport tasks created / doesn't need to be backported

[przemyslavic]

Some of the existing tests were fixed/refactored and new ones were added.