Spar Polysemy: Split IdPRawMetadataStore from IdP

[isovector]

This PR splits IdpRawMetadataStore from the IdP effect, which was accidentally paired together when I was separating effects.

Checklist

• The PR Title explains the impact of the change.
• The PR description provides context as to why the change should occur and what the code contributes to that effect.
• A file with the changelog entry in one or more suitable sub-sections. The sub-sections are marked by directories inside changelog.d.

[mdimjasevic]

This is rather straightforward. It looks good!

[fisx]

 [23 of 55] Compiling Spar.Sem.IdP.Mem
 /wire-server/services/spar/src/Spar/Sem/IdP/Mem.hs:21:12: error:
     • Occurs check: cannot construct the infinite type:
         a ~ (TypedState, a)
       Expected type: Sem (Eff.IdP : r) a -> Sem r (TypedState, a)
         Actual type: Sem (Eff.IdP : r) a -> Sem r a
     • In the expression: evState . evEff

you should be able to reproduce that locally by running

{stack,cabal} test spar

I wonder why you didn't run into it in your IDE?

[isovector]

I can now. I wonder if this is weird stack caching stuff again 😕