docs: update AWS Athena and Redshift docs

[mdeshmu]

SUMMARY

update AWS Athena and Redshift docs

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[rusackas]

Paging @cbuffevant for a review (via the Database Familiarity Rolodex - sign on up, everyone!)

[john-bodley]

cc @sfirke

[cbuffevant]

LGTM the Readshift part. I tried them out in our cluster.

[rusackas]

redshift.mdx is failing the linter because of spaces at the ends of lines. If you can clean that up by hand or by running pre-commit run --all-files this should pass CI and be mergeable :)

[mdeshmu]

Thanks for fixing the PR title and attempting to fix the lint issues @rusackas :)
I have run pre-commit and fixed the issues. All tests are green now.

[sfirke]

I can't speak to the substance of the changes - they look like a nice addition! - but left a few small suggestions where there was a missing word or sentence that didn't read smoothly.

[mdeshmu]

thanks @sfirke for the review. I have addressed your comments.