Add `coder_script` parameter for `script_args`

I recently pushed the `copyparty` module to the registry and while creating it, I found that I had to template some CLI args that I really just needed to pass onto a final binary process.

In my case, I was populating an array of arguments, and actually created a bug in my module based on how they were being passed and parsed.

It would be nice to add an arguments parameter for things that just need to be passed on to the next process similar to defining the CMD parameter for a container.

```tf
resource "coder_script" "code-server" {
agent_id = coder_agent.dev.id
display_name = "code-server"
icon = "/icon/code.svg"
run_on_start = true
start_blocks_login = true
script = templatefile("./install-code-server.sh", {
LOG_PATH : "/tmp/code-server.log"
})
script_arguments = [
"Arg1",
"Arg2",
"Arg3",
]
}
```

Then in my script I could have the following:

```bash
mybin "${@}"
```