Drop python 3.8 support and add python 3.12 tests

[t-imamichi]

Summary

Addresses #638

qiskit-machine-learning also dropped the support of Python 3.8 already.
qiskit-community/qiskit-machine-learning#826

This adds tests of python 3.12 for Linux and Windows because the latest CPLEX provides wheels for the platforms.
Note that CPLEX does not provide a wheel for Python 3.12 on macOS.

• https://pypi.org/project/cplex/22.1.2.0/#files (only Windows and Linux)

This also simplifies gurobipy constraints because gurobipy provides arm64 wheels.

• https://pypi.org/project/gurobipy/12.0.1/#files

Details and comments

[coveralls]

Pull Request Test Coverage Report for Build 13303486619

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.05%) to 92.104%

---

Totals
Change from base Build 13105033536:	0.05%
Covered Lines:	5681
Relevant Lines:	6168

---

💛 - Coveralls

[TolisChal]

Thanks @t-imamichi! This PR looks good to me.

[t-imamichi]

Added a release note

[Dniskk]

Looks good!

[TolisChal]

LGTM!

[t-imamichi]

We need to drop 3.8 support soon because aer did it for 0.16.1 Qiskit/qiskit-aer#2287

[woodsp-ibm]

Seems fine to me. The tox.ini py313 test env, I guess it doesn't hurt, just seems a bit counter to the max of 3.12.

Of course the Branch Rules will need updating to match these changes.