[WIP] core 6.7.0-SNAPSHOT Integration branch

[vidaldid-rte]

Use this branch to commit the minimal changes required to compile with the breaking changes in core 6.7.0-SNAPSHOT This branch should be kept as close as possible to main. You can merge main into this branch when needed to keep the contiuous build up to date.

Please check if the PR fulfills these requirements

• [ ] The commit message follows our guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

Does this PR already have an issue describing the problem?

What kind of change does this PR introduce?

Does this PR introduce a new Powsybl Action implying to be implemented in simulators or pypowsybl?

• [ ] Yes, the corresponding issue is here
• [ ] No

What is the current behavior?

What is the new behavior (if this is a feature change)?

Does this PR introduce a breaking change or deprecate an API?

• [ ] Yes
• [ ] No

If yes, please check if the following requirements are fulfilled

• [ ] The Breaking Change or Deprecated label has been added
• [ ] The migration steps are described in the following section

What changes might users need to make in their application due to this PR? (migration steps)

Other information: