entropy-test-cli - When storing program, configuration interface files must be provided

[ameba23]

The documentation for the test-cli says we do not have to give configuration interface or aux data interface files when storing a program:

        /// The path to a file containing the program config interface (defaults to empty)
        config_interface_file: Option<PathBuf>,
        /// The path to a file containing the program aux interface (defaults to empty)
        aux_data_interface_file: Option<PathBuf>,

But if we don't provide them, we get an error:

~/r/s/e/e/c/test-cli (master)$ cargo run --release -- store-program -m //Alice ../testing-utils/template_barebones.wasm
    Finished `release` profile [optimized] target(s) in 2.60s
     Running `/home/turnip/radish/src/entropy/entropy-core/target/release/entropy-test-cli store-program -m //Alice ../testing-utils/template_barebones.wasm`
Storing program using account: 5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY
thread 'main' panicked at /home/turnip/radish/src/entropy/entropy-core/crates/test-cli/src/lib.rs:287:50:
No config interface file passed

This is because rather than assign them to vector of length 0, we now check for the Option that is passed in to the run function.

I think that it should be possible to store a program from the CLI without providing these files.