cranelift-wasm: Pass ir::Tables into all the translate_table_* methods

This serves two purposes:

1. It ensures that we call `get_or_create_table` to ensure that the embedder
already had a chance to create the given table (although this is mostly
redundant due to validation).

2. It allows the embedder to easily get the `ir::TableData` associated with this
table, and more easily emit whatever inline JIT code to translate the table
instruction (rather than falling back to VM calls).

cranelift/wasm/src/state/func_state.rs

@@ -202,7 +202,7 @@ pub struct FuncTranslationState {
     heaps: HashMap<MemoryIndex, ir::Heap>,
 
     // Map of tables that have been created by `FuncEnvironment::make_table`.
-    tables: HashMap<TableIndex, ir::Table>,
+    pub(crate) tables: HashMap<TableIndex, ir::Table>,
 
     // Map of indirect call signatures that have been created by
     // `FuncEnvironment::make_indirect_sig()`.
@@ -446,7 +446,7 @@ impl FuncTranslationState {
 
     /// Get the `Table` reference that should be used to access table `index`.
     /// Create the reference if necessary.
-    pub(crate) fn get_table<FE: FuncEnvironment + ?Sized>(
+    pub(crate) fn get_or_create_table<FE: FuncEnvironment + ?Sized>(
         &mut self,
         func: &mut ir::Function,
         index: u32,