About half of the `FuncEnvironment::translate_table_*` methods were using the `TableIndex` newtype, while the other half were using raw `u32`s. This commit makes everything use `TableIndex`.
About half of the `FuncEnvironment::translate_table_*` methods were using the `TableIndex` newtype, while the other half were using raw `u32`s. This commit makes everything use `TableIndex`.