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.

https://github.com/deislabs/krustlet-wasm3/blob/48f3cc182ff48be20e31b8fa18a6447c289f0b40/src/provider/mod.rs#L96-L97