implement pg_catalog.pg_type table

[universalmind303]

closes #747
closes #2390

Note, I don't think this quite yet closes the other connector issues. Many of them rely on transactions to work properly (such as #1450)

[tychoish]

is there any kind of test we should write?

is the nested view stack problem the kind of thing that we should raise with datafusion? It seems like we don't really have enough control or tools to push the stack size back down?

[universalmind303]

is there any kind of test we should write?

is the nested view stack problem the kind of thing that we should raise with datafusion? It seems like we don't really have enough control or tools to push the stack size back down?

release already uses different optimizations & removes all debug symbols, so this isn't really an issue outside of development. Since this is something we've already done with our SLT for the exact same reason, it feels reasonable to introduce it here as well.

its really only an issue in develop, and it is a somewhat known one. There are a few issues already open in datafusion wrt SO during planning.

[scsmithr]

This looks good. Let's add an SLT to assert we can query this without erroring.