Make some private functions internal to allow the developpement of "withSignature" functions (like permit) (#2568)

* add internal _setOwner in Ownable

* address issues raised in #2567

* updte changelog entry

* improve changelog and documentation

* rephrasing doc

* add cahngelog improvement lost in merge

* notify deprecation of _setupRole in changelog

* Demote caution to note

* Update CHANGELOG.md

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

Bumps [tar](https://github.com/npm/node-tar) from 4.4.17 to 4.4.19.
- [Release notes](https://github.com/npm/node-tar/releases)
- [Changelog](https://github.com/npm/node-tar/blob/main/CHANGELOG.md)
- [Commits](https://github.com/npm/node-tar/compare/v4.4.17...v4.4.19)

---
updated-dependencies:
- dependency-name: tar
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

(cherry picked from commit 4ac1070c)

(cherry picked from commit 38c1dd09)

(cherry picked from commit b174f067)

(cherry picked from commit 9253c614)

(cherry picked from commit 049ff9a3)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>
Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

* Fix inconsistencies in contract/test hierachy

* changelog entry

Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>