Add new checks (athena, kms, eks) and fixes

[taraspos]

Summary

This PR adds following improvements:

• Couple of new checks (kms, athena, eks, launch_templates)
• Replaces most of the calls with paginated ones
• Adds cache in certain places to reduce amount of calls made to AWS API

Testing

Run checks before/after those changes and compared diff to make sure that nothing is missing and only new checks and fixes are present.