[RF] Set workspace on imported roofit objects

[will-cern]

Imported RooAbsArgs should have their workspace set to the workspace they are being imported to.

Can we please sweep this into 6.30 patches too please.

[phsft-bot]

Can one of the admins verify this patch?

[guitargeek]

@phsft-bot build

[phsft-bot]

Starting build on ROOT-performance-centos8-multicore/soversion, ROOT-ubuntu2204/nortcxxmod, ROOT-ubuntu2004/python3, mac12arm/cxx20, windows10/default
How to customize builds

[phsft-bot]

Build failed on ROOT-ubuntu2204/nortcxxmod.
Running on root-ubuntu-2204-2.cern.ch:/home/sftnight/build/workspace/root-pullrequests-build
See console output.

Failing tests:

• projectroot.tmva.pymva.test.PyMVA_Torch_Regression
• projectroot.tmva.pymva.test.PyMVA_Torch_Classification
• projectroot.tmva.pymva.test.PyMVA_Torch_Multiclass
• projectroot.tmva.pymva.test.gtest_tmva_pymva_test_TestRModelParserPyTorch

[phsft-bot]

Build failed on ROOT-ubuntu2004/python3.
Running on root-ubuntu-2004-1.cern.ch:/home/sftnight/build/workspace/root-pullrequests-build
See console output.

Failing tests:

• projectroot.tmva.pymva.test.PyMVA_Torch_Classification
• projectroot.tmva.pymva.test.PyMVA_Torch_Regression
• projectroot.tmva.pymva.test.PyMVA_Torch_Multiclass
• projectroot.tmva.pymva.test.gtest_tmva_pymva_test_TestRModelParserPyTorch

[phsft-bot]

Build failed on ROOT-performance-centos8-multicore/soversion.
Running on olbdw-01.cern.ch:/data/sftnight/workspace/root-pullrequests-build
See console output.

Failing tests:

• projectroot.runtutorials.tutorial_rcanvas_rline.cxx

[github-actions]

Test Results

    12 files      12 suites   2d 7h 58m 2s ⏱️
 2 561 tests  2 559 ✅ 0 💤 2 ❌
28 810 runs  28 807 ✅ 0 💤 3 ❌

For more details on these failures, see this check.

Results for commit 5710a61.

[guitargeek]

Thank you very much for fixing this! 👍