Fix msg_data type

[kamilsa]

Referenced issues

None

Description of the Change

Fixes issue:

Nov 15 07:45:25 kagomekusama kagome[169038]: [2024-11-15 07:45:25.334] [error]     Mismatched function type. Expected: FuncType {params{i32 , i32 , i32} returns{i64}} , Got: FuncType {params{i32 , i32 , i64} returns{i64}}
Nov 15 07:45:25 kagomekusama kagome[169038]: [2024-11-15 07:45:25.334] [error]     When linking module: "env" , function name: "ext_crypto_ecdsa_sign_prehashed_version_1"
Nov 15 07:45:25 kagomekusama kagome[169038]: [2024-11-15 07:45:25.334] [error]     At AST node: import description
Nov 15 07:45:25 kagomekusama kagome[169038]: [2024-11-15 07:45:25.334] [error]     At AST node: import section
Nov 15 07:45:25 kagomekusama kagome[169038]: [2024-11-15 07:45:25.334] [error]     At AST node: module
Nov 15 07:45:25 kagomekusama kagome[169038]: 24.11.15 07:45:25.334750  pvf              Warning   ApprovalDistribution  Approval validation failed.(parachain id=2274, relay parent=0x36e8…00c5, error=WasmEdge(769) incompatible import type)

Was caused by the wrong type of msg_data parameter in ext_crypto_ecdsa_sign_prehashed_version_1 function.

Instead of WasmSpan, WasmPointer should be used assuming size is 32 according to polkadot-sdk's implementation https://github.com/paritytech/polkadot-sdk/blob/5bc571b0f2de67bd650a8c852c0afdd438377f3f/substrate/primitives/io/src/lib.rs#L1046

Possible Drawbacks

None

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