Enable the `component-model` feature by default in Wasmtime (#7841)

This commit updates the `wasmtime` crate itself to have the
`component-model` feature enabled by default. This was also done for the
CLI but only for clarity because the `component-model` feature was
already eanbled by default transitively through the `serve` feature.

Cargo.toml

@@ -326,6 +326,7 @@ default = [
   "coredump",
   "addr2line",
   "debug-builtins",
+  "component-model",
 
   # Enable some nice features of clap by default, but they come at a binary size
   # cost, so allow disabling this through disabling of our own `default`