[autobackport: sssd-2-9] Smartcard multi token tests

[sssd-bot]

This is an automatic backport of PR#8519 Smartcard multi token tests to branch sssd-2-9, created by @krishnavema.

Please make sure this backport is correct.

Note

The commits were cherry-picked without conflicts.

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-pr8519-to-sssd-2-9
git checkout SSSD-sssd-backport-pr8519-to-sssd-2-9
git push sssd-bot SSSD-sssd-backport-pr8519-to-sssd-2-9 --force

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Original commits
e5b6597 - tests: implement multi-token support for smart card authentication

Backported commits

• 4df5b07 - tests: implement multi-token support for smart card authentication

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Original Pull Request Body

[gemini-code-assist]

Code Review

This pull request introduces new system tests for smart card authentication scenarios involving multiple tokens. It includes a helper function to set up two SoftHSM tokens and three new test cases covering matches on the first token, the second token, and both tokens. The review feedback correctly identifies that the new tests are missing the @pytest.mark.builtwith(client="virtualsmartcard") marker, which is necessary to ensure the tests are skipped in environments without the required smart card dependencies.