Investigate Compilation Performance: nospecialize on function params

We should be able to use @nospecialize on the arguments to Salsa derived functions and input functions, because the code should be entirely unchanged no matter what the type of the argument is: look it up then get it out of the dictionary.

But when we tried adding it, we either didn't see any affect at all, or sometimes it even got slower, maybe?

We should do a thorough investigation here and settle on the right answer.

For example:
https://github.com/RelationalAI-oss/Salsa.jl/blob/705f61017439290bc811e496f0abf1978ac66799/src/default_storage.jl#L140-L146

https://github.com/RelationalAI-oss/Salsa.jl/blob/705f61017439290bc811e496f0abf1978ac66799/src/default_storage.jl#L302-L309

This one doesn't have a TODO, but i also don't really know if it's doing anything:
https://github.com/RelationalAI-oss/Salsa.jl/blob/705f61017439290bc811e496f0abf1978ac66799/src/Salsa.jl#L608-L609