Fix conan build failure caused by failing pyjwt testcase

[wirew0rm]

Ignore a failing test in the downgraded pyjwt dependency.
See #122461 for another instance of the same problem.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[wirew0rm]

some more context:

cc @bjornfor because he did the downgrade to 1.7.1

Shortly afterwards the pyjwt was upgraded from 2.0.1 to 2.1.0, where a previously suprressed test now passes and the suppression was removed.
There were attempts to suppress this test conditionally depending on the version, which didn't work: #122380

[HaoZeke]

LGTM!

[bjornfor]

Thanks!