Remove sqlalchemy upper version constraint for python client

[MarcBresson]

Description

There are only a few breaking changes listed in https://docs.sqlalchemy.org/en/20/changelog/migration_20.html#the-1-4-2-0-migration-path, and not is impacting this project.

Closes #13991

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This PR has:

• been self-reviewed.
  • concurrent read
  • concurrent write
  • concurrent read and write
• added documentation for new or modified features or behaviors.
• added Javadocs for most classes and all non-trivial methods.
• added or updated version, license, or notice information
• added comments explaining the "why" and the intent of the code wherever would not be obvious
  for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold
  for code coverage.
• added integration tests.
• been tested in a test IoTDB cluster.

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Key changed/added classes (or packages if there are too many classes) in this PR

[github-actions]

Hi, this is your first pull request in IoTDB project. Thanks for your contribution! IoTDB will be better because of you.

[CritasWang]

@MarcBresson

There are still some issues that require further modifications

https://github.com/apache/iotdb/actions/runs/11910341559/job/33262355435?pr=14083
https://github.com/apache/iotdb/actions/runs/11910341559/job/33262354350?pr=14083

[MarcBresson]

FYI, the reason why I can't run the tests locally is because I have the following error : ModuleNotFoundError: No module named 'iotdb.thrift', that's why I need to do back and forth with the CI pipeline.

[HTHou]

Hi, thanks for your work. It seems that the CI with sqlalchemy 2.0 finally works. However, the tests with sqlalchemy 1.4 failed. Is there any way we can support both 1.4 and 2.0?