getdeps: select EL-specific manifest sections by distro_family

[michel-slm]

The manifests that mean "any Enterprise Linux 9" (or 8) spell it as distro=centos_stream, because CentOS Stream is what CI runs. That never matched AlmaLinux or Rocky, and after the previous change gave RHEL its own distro name it would not match RHEL either. The most consequential case is cachelib's gcc-toolset-14: without it an EL 9 build uses the default GCC 11 and fails to compile C++20 code although the toolset is right there in the repositories.

Rewrite those sections with the distro_family variable introduced in the previous change, preserving each selector's meaning while extending it to the whole family:

- all(distro=centos_stream,distro_vers=9)  -> all(distro_family=rhel,distro_vers=9)
  cachelib, gcc12, gcc14, openr, python, python-setuptools,
  rebalancer, rebalancer-explorer
- all(distro=centos_stream,distro_vers=8)  -> all(distro_family=rhel,distro_vers=8)
  boost, boost-python
- not(all(any(distro=centos_stream,distro=centos),distro_vers=8))
                                            -> not(all(distro_family=rhel,distro_vers=8))
  libmnl
- not(any(all(distro=centos,distro_vers=8),all(distro=centos_stream,distro_vers=9)))
                                            -> not(all(distro_family=rhel,any(distro_vers=8,distro_vers=9)))
  lz4, lz4-python
- rpms.any(distro=centos_stream,...,distro=fedora) -> rpms
  libaio, numa (every rpm distro ships libaio-devel and numactl-devel)
- rpms.distro=centos_stream                -> rpms.distro_family=rhel
  libaio-python

"centos" was the old CentOS Linux 8 name and folds into the family. No manifest still selects on an individual EL distro name.

This must land after the distro_family change: the expression parser rejects unknown selector variables, so on a getdeps without it these manifests fail to load.

Tested with both changes applied: every manifest passes validate-manifest, and install-system-deps --recursive --dry-run --os-type linux --distro rhel --distro-version 9 cachelib now yields the same package set as --distro centos_stream, including gcc-toolset-14, libaio-devel and numactl-devel, where before it lacked all three. The openr, rebalancer and rebalancer-explorer hunks are the same mechanical rewrite but those projects were not built here.

Depends on #495 (distro_family): must land after it, since the expression parser rejects unknown selector variables. Submitted separately so each can be reviewed on its own; the two are otherwise independent of #494.

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[meta-codesync]

@michel-slm has imported this pull request. If you are a Meta employee, you can view this in D120501944.