Closes #1375

Closes #1296

After this is merged I'll do an API release which will also solve
https://github.com/actualbudget/actual/issues/1303

Co-authored-by: Matiss Janis Aboltins <matiss@mja.lv>

Good catch @Jackenmen in
https://github.com/actualbudget/actual/pull/948#issuecomment-1580501909
— I’ve also added a CI check to ensure bad migrations aren’t introduced
in the future.

I think if you have a budget that has managed to have this migration
applied successfully, you’ll need to manually patch
`getAppliedMigrations` in
`packages/loot-core/src/server/migrate/migrations.ts` and inject a query
to remove the old migration ID and insert the new one.

Closes #944, closes #532. ~WIP because something is causing the test
budget to fail to create because it’s using INSERT instead of UPDATE sql
queries. (Or not? I have no idea)~

Fixes #615. I would appreciate double-checking that I didn’t
accidentally delete anything that is important.

Since I’m removing the related API methods, this is technically a
breaking change (even if people would have no reason to remove this
stuff), so we should probably do a major release of the API package.

Co-authored-by: Jed Fox <git@jedfox.com>

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