implement --stack-size

[bacongobbler]

The krustlet should be able to change the number of memory pages available for the stack. This is necessary to allow this provider to run in locations where memory size is limited.

krustlet-wasm3/src/provider/mod.rs

Lines 96 to 97 in 48f3cc1

	// TODO: expose this as a feature flag (--stack-size)
	let mut runtime = Runtime::new(module_data, (1024 * 60) as u32, self.log_path.clone()).await?;