Update to TypeScript 5.7.2.

[samwho]

Description

For reasons that aren't clear to me, this also required some fiddling with testcontainers.

1. I disabled the ryuk testcontainers feature. This cleaned up images after tests had finished, but we don't need it because we tend to reuse images or delete them manually. I did this because for whatever reason it was reading from the wrong Docker socket on my local machine all of a sudden, and failing the backend-core tests.
2. I upgraded to testcontainers 10.16.0 in an attempt to fix the above. It didn't work, but I figured I'd stick on this version anyway. It allows us to get rid of the code that removes stopped images, because the latest version of testcontainers can restart stopped images.

[qa-wolf]

QA Wolf here! As you write new code it's important that your test coverage is keeping up.
Click here to request test coverage for this PR!

[adrinr]

LGTM!