[9.0](backport #3270) Bump setuptools from 74.1.2 to 78.1.1 in /tests (#3382)

* Bump setuptools from 74.1.2 to 78.1.1 in /tests (#3270)

Bumps [setuptools](https://github.com/pypa/setuptools) from 74.1.2 to 78.1.1.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v74.1.2...v78.1.1)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-version: 78.1.1
  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 0792732)

# Conflicts:
#	tests/poetry.lock

* fix merge conflicts

---------

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Dmitry Gurevich <dmitry.gurevich@elastic.co>

Author: 3 people