chore!: Make interface actions synchronous

[FrederikBolding]

Interface actions used to be required to be asynchronous, this is no longer the case.

---

Note

Convert Snap interface create/update flows from async to sync across controllers, RPC handlers, simulation hooks, and tests.

• Controllers:
  • Make SnapInterfaceController#createInterface, updateInterface, and private #validateContent synchronous; remove await usage.
• RPC Methods:
  • Update snap_createInterface and snap_updateInterface implementations and hook types to return synchronously (no Promise).
• Simulation:
  • Make permitted hooks createInterface/updateInterface synchronous; adjust getInterfaceFromResult to call controller without await.
• Tests:
  • Remove await from synchronous calls; switch async rejection assertions to synchronous .toThrow where applicable; update usages across controller, simulation, and request tests.

^{Written by Cursor Bugbot for commit c8e8a1b. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.29%. Comparing base (8571a4d) to head (c8e8a1b).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3361      +/-   ##
==========================================
+ Coverage   98.27%   98.29%   +0.01%     
==========================================
  Files         417      417              
  Lines       11903    11907       +4     
  Branches     1845     1848       +3     
==========================================
+ Hits        11698    11704       +6     
+ Misses        205      203       -2     

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