Atomic view update

[joshua-spacetime]

Description of Changes

Updates views atomically on commit, but before downgrading to a read-only transaction for subscription evaluation.

What this patch does:

1. Renames ViewId to ViewFnPtr
2. Renames ViewDatabaseId to ViewId
3. Removes the module_rx module watcher from the subscription manager
4. Refactors read sets to only track table scans (index key tracking will be added later)
5. Drops read sets and removes rows from st_view_sub when dropping a view in an auto-migrate
6. Re-evaluates and updates views (call_views_with_tx) from call_reducer_with_tx for any view whose read set overlaps with the reducer's write set
7. Does the same for sql dml

API and ABI breaking changes

None

Expected complexity level and risk

3

It's a bit of a messy diff.

Testing

• Integrate with SQL smoketests for views #3616