Resolve "List of broken links"

Description

Many parts of the source mention link to missing https://octopus-code.org/experimental_features this MR points them to the right link https://www.octopus-code.org/documentation/main/variables/execution/debug/experimentalfeatures/

News snippet

fix broken links

Checklist

• I have checked that my code follows the Octopus coding standards
• I have added tests for all the new features added in this request.

Closes #787 (closed)