AIX playbooks failing in `baselayout` role due to `libunwind.a` dependency on OSUOSL systems

When attempting to deploy the playbooks on the AIX 7.2 machines at OSUOSL there is a dependency problem showing up. This did not affect the IBM machines (which already had rust installed):

TASK [baselayout : install packages] *******************************************
task path: /home/sxa/git/nodebuild/ansible/roles/baselayout/tasks/main.yml:60
ok: [test-osuosl-aix72-ppc64_be-4] => (item=gcc8-c++,gcc12-c++) => {"ansible_loop_var": "package", "changed": false, "msg": "Nothing to do", "package": "gcc8-c++,gcc12-c++", "rc": 0, "results": []}
Depsolve Error occurred: 
 Problem 1: cannot install the best candidate for the job
  - nothing provides libunwind.a(libunwind.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
  - nothing provides libc++.a(libc++.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
  - nothing provides libc++abi.a(libc++abi.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
 Problem 2: package rustfmt1.88-1.88.0-1.ppc from AIX_Toolbox_72 requires rust1.88 >= 1.88.0, but none of the providers can be installed
  - cannot install the best candidate for the job
  - nothing provides libunwind.a(libunwind.so.1) needed by rust1.88-1.88.0-0.ppc from AIX_Toolbox_72
  - nothing provides libc++.a(libc++.so.1) needed by rust1.88-1.88.0-0.ppc from AIX_Toolbox_72
  - nothing provides libc++abi.a(libc++abi.so.1) needed by rust1.88-1.88.0-0.ppc from AIX_Toolbox_72
  - nothing provides libunwind.a(libunwind.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
  - nothing provides libc++.a(libc++.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
  - nothing provides libc++abi.a(libc++abi.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
 Problem 3: package cargo1.88-1.88.0-1.ppc from AIX_Toolbox_72 requires rust1.88 >= 1.88.0, but none of the providers can be installed
  - cannot install the best candidate for the job
  - nothing provides libunwind.a(libunwind.so.1) needed by rust1.88-1.88.0-0.ppc from AIX_Toolbox_72
  - nothing provides libc++.a(libc++.so.1) needed by rust1.88-1.88.0-0.ppc from AIX_Toolbox_72
  - nothing provides libc++abi.a(libc++abi.so.1) needed by rust1.88-1.88.0-0.ppc from AIX_Toolbox_72
  - nothing provides libunwind.a(libunwind.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
  - nothing provides libc++.a(libc++.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72
  - nothing provides libc++abi.a(libc++abi.so.1) needed by rust1.88-1.88.0-1.ppc from AIX_Toolbox_72", "package": "bash,cmake,coreutils,curl,gcc-c++,tar,unzip,git,make,sudo,python3-setuptools,python3,xz,rust1.88,cargo1.88,rustfmt1.88

This is from the AIX system package libunwind.rte which is part of the IBM_OPEN_XL_CPP_RUNTIME_17.1.4.1_AIX.tar.Z package archive from IBM so that will need to be installed in order to resolve this. Ref: https://github.com/nodejs/build/blob/main/ansible/MANUAL_STEPS.md#install-clang-backend

Start with ansible/roles/baselayout/tasks/main.yml at the package-install task and the referenced install-clang-backend section in ansible/MANUAL_STEPS.md. Reproduce the AIX 7.2 OSUOSL failure, then verify that installing the IBM_OPEN_XL_CPP_RUNTIME_17.1.4.1_AIX.tar.Z contents resolves libunwind.a, libc++.a, and libc++abi.a so the playbook installs rust, cargo, and rustfmt successfully.