Remove some custom error types in Wasmtime (#5347)

* Remove some custom error types in Wasmtime

These types are mostly cumbersome to work with nowadays that `anyhow` is
used everywhere else. This commit removes `InstantiationError` and
`SetupError` in favor of using `anyhow::Error` throughout. This can
eventually culminate in creation of specific errors for embedders to
downcast to but for now this should be general enough.

* Fix Windows build

crates/jit/Cargo.toml

@@ -14,7 +14,6 @@ edition.workspace = true
 wasmtime-environ = { workspace = true }
 wasmtime-jit-debug = { workspace = true, features = ["perf_jitdump"], optional = true }
 wasmtime-runtime = { workspace = true }
-thiserror = { workspace = true }
 target-lexicon = { workspace = true }
 anyhow = { workspace = true }
 cfg-if = "1.0"