QA: Aqua/JET findings marked @test_broken pending fix

While finalizing the grouped-tests CI conversion (branch grouped-tests-ci), the QA group's Aqua checks surfaced one genuine failure that is now wrapped as @test_broken in test/qa/qa.jl so the QA group is green and the PR can merge. It should be fixed and un-broken.

Finding (1 failure):

• Aqua.test_deps_compat(RuntimeGeneratedFunctions) fails its extras sub-check: the package does not declare a [compat] entry for the test-only extra Pkg (44cfe95a-1eb2-52ea-b672-e2afdf69b78f).

  RuntimeGeneratedFunctions does not declare a compat entry for the following extras:
   Pkg [44cfe95a-1eb2-52ea-b672-e2afdf69b78f]
  

What was changed in the QA driver: Aqua.test_deps_compat is now called with check_extras = false (so the still-passing julia / deps / weakdeps sub-checks keep running and keep failing the suite if they regress), and the extras failure is recorded as @test_broken false referencing this issue.

Fix: add a [compat] entry for Pkg (e.g. Pkg = "1") in Project.toml, then remove the check_extras = false override and the @test_broken line.

Ignore until reviewed by @ChrisRackauckas.

Review Project.toml and test/qa/qa.jl, then run the Aqua QA checks to reproduce the extras failure for Pkg. Add the stated Pkg compatibility entry, remove the check_extras override and @test_broken line, and rerun the QA suite so the extras check passes without suppressing it.