Enable committer-date-is-author-date for interactive rebase

[Sbrjt]

This PR implements committer-date-is-author-date flag for interactive rebase.

Fixes: #3623

Question: The current UI works because it shows a few predefined rebase modes. If more flags need to be exposed can we try a checkbox based ui?

Checklist

• I have followed the guidelines in the Contributing document
• My changes follow the coding style of this project
• My changes build without any errors or warnings
• My changes have been formatted and linted
• My changes include any required corresponding changes to the documentation (including CHANGELOG.md and README.md)
• My changes have been rebased and squashed to the minimal number (typically 1) of relevant commits
• My changes have a descriptive commit message with a short title, including a Fixes $XXX - or Closes #XXX - prefix to auto-close the issue that your PR addresses