[fix] Add to dns only if machines are ready + Fix AWS sdk behavior

[tchinmai7]

What this PR does / why we need it:

1. Add nodes to the dns only when its ready
2. pass config options to the aws sdk to turn off checksum protections.
   Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
   Fixes #

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests
• adds or updates e2e tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.21%. Comparing base (63f5b41) to head (d6e6c71).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #639      +/-   ##
==========================================
- Coverage   63.42%   63.21%   -0.21%     
==========================================
  Files          70       70              
  Lines        6086     6090       +4     
==========================================
- Hits         3860     3850      -10     
- Misses       1962     1976      +14     
  Partials      264      264              

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