feat(core): staleTime: 'static' (#9139)

* feat(core): StaleTime.Static

* fix: consider StaleTime.Static for invalidation

previously, it didn't matter if we included `stale: true` or not in the filters for refetch, because marking things with query.invalidate() would set them all to stale anyway.

Now, queries with StaleTime.Static will be marked as `invalidated`, but still shouldn't be refetched. The `isStale` filter logic accounts for that, so we have to include it in the filters

* fix: isStale order check

check for observers first because they contain the source of truth calculated with `isStaleByTime`, and it also takes enabled into account

* fix: isStaleByTime logic

we have to check for undefined data first, because queries without data are really always stale; then, the next check must be against StaleTime.Static, because queries that are marked as invalidated are still not stale, even if they are static.

* tests

* fix: type issue in react

* fix: make sure invalidation _always_ only refetches stale queries

this ensures we never refetch Static queries

* fix: never refetch static queries

* fix: make sure we don't refetchOn... for StaleTime.Static even when 'always' is set

* docs: StaleTime.Static

* ref: switch to 'static' string

* docs