feat(boto3/dynamo): use tcp_keepalive

[gagantrivedi]

Thanks for submitting a PR! Please check the boxes below:

• I have run pre-commit to check linting
• I have filled in the "Changes" section below?
• I have filled in the "How did you test this code" section below?
• I have used a Conventional Commit title for this Pull Request

Changes

Use tcp_keepalive when creating dynamodb resource

How did you test this code?

Ran this code locally to make sure it works

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 7, 2023 10:56am
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 7, 2023 10:56am
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 7, 2023 10:56am

[gagantrivedi]

Closes #2846

[github-actions]

Uffizzi Preview deployment-40113 was deleted.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3732e67) 95.63% compared to head (b460236) 95.63%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2926   +/-   ##
=======================================
  Coverage   95.63%   95.63%           
=======================================
  Files        1012     1012           
  Lines       29137    29139    +2     
=======================================
+ Hits        27866    27868    +2     
  Misses       1271     1271           

Files	Coverage Δ
api/environments/dynamodb/dynamodb_wrapper.py	96.03% <100.00%> (+0.03%)	⬆️
...s/dynamodb/tests/test_dynamodb_identity_wrapper.py	98.22% <100.00%> (+0.01%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[zachaysan]

Looks good to me!