Remove host::Error::WrongParamTy as it can't happen anymore

[tomaka]

Given that host function signatures are now checked at initialization (#183), it can't happen anymore that the runtime passes a parameter of the wrong type. This is ensured by the Wasm VM.

[github-actions]

twiggy diff report

Difference in .wasm size before and after this pull request.

---

 Delta Bytes │ Item
─────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────
       -9571 ┊ smoldot::executor::host::ReadyToRun::run_once::h80cf4f232b7dc076
       -1731 ┊ <&T as core::fmt::Display>::fmt::h26682a0d1742d67b
       +1515 ┊ <&T as core::fmt::Display>::fmt::h29330ad1a6dfc0c6
       -1064 ┊ <smoldot::executor::host::Error as core::fmt::Debug>::fmt::hf55ef125bf04ab80
        +927 ┊ <smoldot::executor::host::Error as core::fmt::Debug>::fmt::h60f90c510f26338d
        -413 ┊ <smoldot::executor::host::Error as core::clone::Clone>::clone::hc1965d2975e47f93
        +367 ┊ <smoldot::executor::host::Error as core::clone::Clone>::clone::hdd6dbdf054411509
        -208 ┊ smoldot::executor::host::Inner::alloc::h24deaf212dd15f17
        +208 ┊ smoldot::executor::host::Inner::alloc::hf46ab8be55f70e11
        -112 ┊ data[0]
         +63 ┊ core::ptr::drop_in_place<smoldot::executor::host::Error>::h1db292565c81cf60
         -63 ┊ core::ptr::drop_in_place<smoldot::executor::host::Error>::h71e655456c626e8d
         -63 ┊ core::ptr::drop_in_place<smoldot::executor::host::Error>::h98ec53de5d641ebb
         +63 ┊ core::ptr::drop_in_place<smoldot::executor::host::Error>::he24f0d4dc729fb03
         -52 ┊ <smoldot_light::runtime_service::RuntimeCallError as core::clone::Clone>::clone::h1a7c7e2c1b4fa4aa
         +17 ┊ <&T as core::fmt::Debug>::fmt::ha8524c19856de8b8
         -17 ┊ <&T as core::fmt::Debug>::fmt::hbb1732b2f1b58949
          +6 ┊ <&T as core::fmt::Display>::fmt::hd613e9b79c40ba29
      -10128 ┊ Σ [18 Total Rows]