2499: First pass on TableOps fuzzer generator wasm_encoder migration (#2501)

* 2499: First pass on TableOps fuzzer generator wasm_encoder migration

- wasm binary generated via sections and smushed together into a module
- test: compare generated wat against expected wat
- note: doesn't work
  - Grouped instructions not implemented
  - Vec<u8> to wat String not implemented

* 2499: Add typesection, abstract instruction puts, and update test

- TableOp.insert now will interact with a function object directly
- add types for generated function
- expected test string now reflects expected generated code

* 2499: Mark unused index as _i

* 2499: Function insertion is in proper stack order, and fix off by 1
      index

- imported functions must be typed
- instructions operate on a stack ie. define values as instructions
  before using

* 2499: Apply suggestions from code review

- typo fixing
- oracle ingests binary bytes itself

Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>

* 2499: Code cleanup + renaming vars

- busywork, nothing to see here

Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>

crates/fuzzing/Cargo.toml

@@ -17,6 +17,7 @@ wasmparser = "0.70"
 wasmprinter = "0.2.17"
 wasmtime = { path = "../wasmtime" }
 wasmtime-wast = { path = "../wast" }
+wasm-encoder = "0.2"
 wasm-smith = "0.3.0"
 wasmi = "0.7.0"