Add script to regenerate regression tests

[ana-pantilie]

Part of #2410

• Adds a script which generates the files for the evm-semantics and wasm-semantics regression tests.
• Renames the two test directories to regression-evm and regression-wasm.

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Review checklist

The author performs the actions on the checklist. The reviewer evaluates the work and checks the boxes as they are completed.

• Summary. Write a summary of the changes. Explain what you did to fix the issue, and why you did it. Present the changes in a logical order. Instead of writing a summary in the pull request, you may push a clean Git history.
• Documentation. Write documentation for new functions. Update documentation for functions that changed, or complete documentation where it is missing.
• Tests. Write unit tests for every change. Write the unit tests that were missing before the changes. Include any examples from the reported issue as integration tests.
• Clean up. The changes are already clean. Clean up anything near the changes that you noticed while working. This does not mean only spatially near the changes, but logically near: any code that interacts with the changes!

[ttuegel]

What does this do?

[ana-pantilie]

I think @MirceaS originally wrote this, it was included in one of the PRs he had to revert, but I suppose this was also reverted by accident.

Without this change to kollect, we wouldn't be able to extract the files generated by the frontend, because on the latest versions the way the temporary files are named has changed.