extension: Update to wasm32-wasip2 target (#30953)

Cleans things up now that wasm32-wasip2 is a supported target.

Before we merge, I will need to test against the current extensions to
make sure this is fine.

However, since our wit world isn't using any wasi package imports, this
shouldn't be a breaking change.

Release Notes:

- N/A

Cargo.toml

@@ -603,7 +603,6 @@ url = "2.2"
 urlencoding = "2.1.2"
 uuid = { version = "1.1.2", features = ["v4", "v5", "v7", "serde"] }
 walkdir = "2.5"
-wasi-preview1-component-adapter-provider = "29"
 wasm-encoder = "0.221"
 wasmparser = "0.221"
 wasmtime = { version = "29", default-features = false, features = [
@@ -617,7 +616,6 @@ wasmtime = { version = "29", default-features = false, features = [
 ] }
 wasmtime-wasi = "29"
 which = "6.0.0"
-wit-component = "0.221"
 workspace-hack = "0.1.0"
 zed_llm_client = "0.8.3"
 zstd = "0.11"