Add support for Python 3.14

[kratz00]

See exasol/pytest-plugins#132

Please note:

• PYTSLC depends on ITDE, with transitive dependency to Luigi.
• Luigi does not support Python 3.14, yet, see Add support for python 3.14 spotify/luigi#3430

[ckunki]

Please ignore the comment I added to exasol/pytest-plugins#132.

[kratz00]

The original error boils down to trying to build a wheel for pydantic-core (==2.33.2) using Python 3.14.
Python 3.14 was officially supported in v2.12.0 of Pydantic (which uses pydantic-core (==2.41.1))

pytest-slc currently uses:

• pydantic==2.12.5
• pydantic_core==2.41.5