fix: remove deprecated file for arguments

[paaragon]

Summary

This PR removes the deprecated creation of the arguments.serverless file

Details and comments

[avilches]

LGTM, but I'm not familiar with the arguments feature... The ArgumentsStorage class is still used from RunJobSerializer.create. Does this need to be removed too @Tansito @ElePT ?

[ElePT]

I am not super familiar either, but it looks like the class is used in several components, so in order to remove it there would have to be more changes. Maybe that's the plan from the beginning @Tansito, to do it gradually?

[Tansito]

Without looking to the implementation yet this PR was created to remove a piece of code that it was generating a file called arguments.serverless. It was needed to maintain backward compatibility for versions previous to 0.26 of Qiskit Serverless. Now that we have all the partners migrated to 0.26 we can just remove it because arguments were migrated to the Object Storage in that exact version: #1671

The access to the arguments in the object storage is being managed by ArgumentsStorage, class added in the previous PR and continue being used by the feature itself in other parts of the API and Scheduler when we need to interact with the arguments file.