Add Python3.12 in test matrix

[pankajastro]

CI Job: https://github.com/astronomer/astro-provider-anyscale/actions/runs/9626892816/

[marwan116]

@venkatajagannath @pankajastro please address the below comments and then let us:

• merge this PR
• rebase the changes4 branch so its PR becomes the one we provide a final code review on

Comments:

• Update the pyproject.toml file so that classifiers includes "Programming Language :: Python :: 3.12"
• Should we also update the pyproject.toml file so that requires-python to be >=3.8, <=3.12 ?

[pankajastro]

Comments:

• Update the pyproject.toml file so that classifiers includes "Programming Language :: Python :: 3.12"
• Should we also update the pyproject.toml file so that requires-python to be >=3.8, <=3.12 ?

The classifiers in the pyproject file have Python3.12, and I have addressed the second point in this PR.