refactor: replace wiremock with own test harness

Reasons:
- there are too many layers of types that transfer/modify things
- we gonna need a test harness that supports TLS/HTTPs
- we need kinda precise control over which protocols are used to know
  what we're actually testing here
- I wanna use something simple, i.e. not a full-blown "we launch a
  server in the background" magic thing like `httpmock`

Author: crepererum

Cargo.lock

@@ -32,18 +32,21 @@ wasmtime-wasi-http.workspace = true
 wasmtime-wasi-io.workspace = true
 
 [dev-dependencies]
+bytes = "1.11.1"
 datafusion-udf-wasm-bundle = { workspace = true, features = [
   "evil",
   "example",
   "python"
 ] }
 flate2.workspace = true
 gungraun.workspace = true
+http-body-util = { version = "0.1.3", features = ["full"] }
+hyper-util = { version = "0.1.20", features = ["server", "tokio"] }
 insta.workspace = true
 regex.workspace = true
+reqwest = { version = "0.13.2", default-features = false }
 target-lexicon.workspace = true
 tokio = { workspace = true, features = ["fs", "macros"] }
-wiremock = "0.6.5"
 
 [features]
 default = ["compiler"]

host/Cargo.toml

@@ -21,17 +21,23 @@ pub use crate::component::CompilationFlags;
 
 // unused-crate-dependencies false positives
 #[cfg(test)]
+use bytes as _;
+#[cfg(test)]
 use datafusion_udf_wasm_bundle as _;
 #[cfg(test)]
 use flate2 as _;
 #[cfg(test)]
 use gungraun as _;
 #[cfg(test)]
+use http_body_util as _;
+#[cfg(test)]
+use hyper_util as _;
+#[cfg(test)]
 use regex as _;
 #[cfg(test)]
-use target_lexicon as _;
+use reqwest as _;
 #[cfg(test)]
-use wiremock as _;
+use target_lexicon as _;
 
 mod bindings;
 mod component;