wasm-wc: Enable environment inheritance

While the C based wasm language module inherits the process environment
the Rust based wasm-wasi-component language module did not.

One upshot of this is that with wasm-wasi-component you don't get access
to any environment variables specified in the Unit configuration.

wasm-wasi-component was based on wasmtime 17.0.0. This capability wasn't
added to the wasmtime-crate until version 20.0.0.

Now that wasm-wasi-component has been updated to a newer wasmtime-crate
we can enable this functionality.

Closes: #1312
[ Commit message - Andrew ]
Signed-off-by: Andrew Clayton <[email protected]>

src/wasm-wasi-component/src/lib.rs

@@ -259,6 +259,7 @@ impl GlobalState {
                 // shouldn't get raw access to stdout/stderr.
                 cx.inherit_stdout();
                 cx.inherit_stderr();
+                cx.inherit_env();
                 for dir in self.global_config.dirs.iter() {
                     cx.preopened_dir(
                         dir,