Update the Run commands to reflect Spec changes

[mrsimonemms]

What happened:
The spec recently changed to make the run.script and run.container more sensible (which I approve of) - serverlessworkflow/specification#1129

The SDK doesn't match this

What you expected to happen:

In the task:

• Script.Arguments to be []any
• Script.STDIn (or similarly named) does not exist
• Arguably, a validation to ensure Script.Language is only python or javascript
• Container.Arguments doesn't exist
• Container.STDIn (or similarly named) does not exist
• probably a couple other changes I've missed

How to reproduce it:

Anything else we need to know?:

Environment:

• Specification version used:

• Go version:

[ricardozanini]

@mrsimonemms are you willing to send a PR?

[mrsimonemms]

Yes. Will look over the weekend