[wasm] Enable PackedSimd in the interpreter; interpreter/jiterpreter v128 bug fixes

[kg]

• Fix trimming only honoring WasmEnableSIMD if AOT was also enabled
• Turn MINT_NIY back into a real opcode that asserts so we can use it as a replacement for unimplemented PackedSimd methods
• Fix incorrect ordering in sri_vector128_t_methods
• Fix missing names in sri_packedsimd_methods
• When transforming a call to a PackedSimd method, always either produce a real implementation or a MINT_NIY so that it will fail in a sensible way instead of overflowing the stack
• Implement V128_Ix_EXTRACT_MSB in the jiterpreter
• New hopefully not broken V128_Ix_CREATE_SCALAR implementation in the jiterpreter

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Issue Details

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• Fix trimming only honoring WasmEnableSIMD if AOT was also enabled
• Turn MINT_NIY back into a real opcode that asserts so we can use it as a replacement for unimplemented PackedSimd methods
• Fix incorrect ordering in sri_vector128_t_methods
• Fix missing names in sri_packedsimd_methods
• When transforming a call to a PackedSimd method, always either produce a real implementation or a MINT_NIY so that it will fail in a sensible way instead of overflowing the stack
• Implement V128_Ix_EXTRACT_MSB in the jiterpreter
• New hopefully not broken V128_Ix_CREATE_SCALAR implementation in the jiterpreter

Author:	kg
Assignees:	-
Labels:	arch-wasm
Milestone:	-