[autobackport: sssd-2-8] tests: python black 26.1.0 style changes

[sssd-bot]

This is an automatic backport of PR#8379 tests: python black 26.1.0 style changes to branch sssd-2-8, created by @justin-stephenson.

Caution

@justin-stephenson The patches did not apply cleanly. It is necessary to resolve conflicts before merging this pull request. Commits that introduced conflict are marked with CONFLICT!.

You can push changes to this pull request

git remote add sssd-bot git@github.com:sssd-bot/sssd.git
git fetch sssd-bot refs/heads/SSSD-sssd-backport-pr8379-to-sssd-2-8
git checkout SSSD-sssd-backport-pr8379-to-sssd-2-8
git push sssd-bot SSSD-sssd-backport-pr8379-to-sssd-2-8 --force

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Original commits
96829a0 - tests: python black 26.1.0 style changes

Backported commits

• c64560d - CONFLICT! tests: python black 26.1.0 style changes

Conflicting Files Information (check for deleted and re-added files)

• CONFLICT! tests: python black 26.1.0 style changes

On branch SSSD-sssd-backport-pr8379-to-sssd-2-8
You are currently cherry-picking commit 96829a000.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   src/tests/system/tests/test_kcm.py
	deleted by us:   src/tests/system/tests/test_pysss_nss_idmap.py

no changes added to commit (use "git add" and/or "git commit -a")

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Original Pull Request Body

Adapt to changes from https://github.com/psf/black/releases/tag/26.1.0

[gemini-code-assist]

Code Review

This pull request backports Python test changes, including adapting to black version 26.1.0 style and adding new tests for pysss_nss_idmap.

My review has identified a critical merge conflict in src/tests/system/tests/test_kcm.py that must be resolved.

Additionally, I've found two high-severity potential command injection vulnerabilities in the new test file src/tests/system/tests/test_pysss_nss_idmap.py due to unsafe string formatting when constructing shell commands. I have provided suggestions to mitigate these risks.

Please address these points to ensure the stability and security of the test suite.