Update wasm-tools crates (#4246)

This commit updates the wasm-tools family of crates, notably pulling in
the refactorings and updates from bytecodealliance/wasm-tools#621 for
the latest iteration of the component model. This commit additionally
updates all support for the component model for these changes, notably:

* Many bits and pieces of type information was refactored. Many
  `FooTypeIndex` namings are now `TypeFooIndex`. Additionally there is
  now `TypeIndex` as well as `ComponentTypeIndex` for the two type index
  spaces in a component.

* A number of new sections are now processed to handle the core and
  component variants.

* Internal maps were split such as the `funcs` map into
  `component_funcs` and `funcs` (same for `instances`).

* Canonical options are now processed individually instead of one bulk
  `into` definition.

Overall this was not a major update to the internals of handling the
component model in Wasmtime. Instead this was mostly a surface-level
refactoring to make sure that everything lines up with the new binary
format for components.

* All text syntax used in tests was updated to the new syntax.

crates/wast/Cargo.toml

@@ -12,7 +12,7 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0.19"
 wasmtime = { path = "../wasmtime", version = "0.39.0", default-features = false, features = ['cranelift'] }
-wast = "41.0.0"
+wast = "42.0.0"
 
 [badges]
 maintenance = { status = "actively-developed" }