Delete MWAA

[ividito]

Summary

Starts to address #315

• Remove MWAA infrastructure
• Remove MWAA CI
• Rework Makefile and scripts to match new folder structure (no more copying dags folder)
• SM2A moved to top level of repo
• Initial documentation refactor in Restructure SM2A documentation #363

TODO

• Workflows API was managed with MWAA terraform. Should we keep it? We could move it into the SM2A infra easily enough, not sure what's needed for the runtime.
• The SM2A README can be combined with the root README, but I haven't done this yet Restructure SM2A documentation #363
• Merge https://github.com/NASA-IMPACT/veda-deploy/pull/113 when we merge this in
• Some of the diffs don't look right (AFAIK many of the sm2a infra files that got marked as deleted were just moved, probably not an issue but I will double-check that the end result is what we intended)

This also unblocks additional work on #351 , where we can significantly improve Docker build times.

[smohiudd]

I think we should fully deprecate workflows API and remove it. We're not promoting it anymore as a way to ingest data

[smohiudd]

Should we merge #272 and #297 first before merging this PR to minimize conflicts?

[ividito]

@smohiudd #272 should definitely go in first, #297 we can discuss at tag-up (I know we were unsure about it - I tested that the feature flag works on SIT, I think we can merge it and decide whether to enable it or not later on)

[ividito]

We'll deploy this to SIT using veda-deploy to test the CI, if that works this should be good to merge

[botanical]

Just some small nits. Thanks for tackling such a large PR