Added functionality to store github events in s3 bucket

[bshien]

Description

Coming from https://github.com/opensearch-project/opensearch-metrics/issues/76

1. Added an S3 bucket
2. Added the automation app docker container to upload github events to s3
3. Added role for ec2 to write to s3.

Issues Resolved

Part of https://github.com/opensearch-project/opensearch-metrics/issues/57

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.57%. Comparing base (a6eb945) to head (f5a4c7f). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #85 +/- ## ============================================ + Coverage 83.48% 83.57% +0.09% Complexity 202 202 ============================================ Files 55 56 +1 Lines 1229 1236 +7 Branches 51 52 +1 ============================================ + Hits 1026 1033 +7 Misses 181 181 Partials 22 22 ```

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