Deprecate OMP from Python package

[RandySheriffH]

Per team's decision, deprecate OMP from packaging to prepare for coming release:

1. For previous openmp build, remove --use_openmp, so thread pool will become default;
2. For previous non-openmp build, add --use_openmp and rename the package to indicate the inclusion.
3. Add a mac build with openmp enabled.

[snnn]

Please also add a package for MacOS openmp. And, in the noopenmp case, please remove the commands for installing openmp from brew.

[snnn]

As we talked offline:

In total we should have 5 different nuget variants:

1. CPU with openmp
2. CPU without openmp
3. GPU
4. CPU without contribops and without openmp
5. Windows AI

And we have 8 packaging piplines. Below are my suggestions:

1. Node.js binding : Need to remove openmp
2. Nuget GPU  (OnnxRuntime-Github): no need to change
3. Nuget WindowsAI: no need to change
4. Python packaging: update the package names and add MacOS
5. Python Packaging  (Training) : no need to change
6. Zip-Nuget-Java Packaging: rename the pipeline name and packages to openmp. And move the GPU part to NoOpenMP pipeline.
7. Zip-Nuget-Java Packaging  NoOpenMP: add GPU part from the noopenmp pipeline.
8. Zip-Nuget-Java Packaging  NoContribOps: no need to change.

Please correct me if I was wrong.

And I suggest you split this PR to 3: nodejs/python/nuget. So that we can validate them separately.

And, BTW, in the master branch the noopenmp nuget pipeline still has a tiny problem. I have a fix in #6664. The others are green now.

[snnn]

LGTM.