Add 3.14 python

[ekomarova]

This PR adds 3.14 to pyproject.toml, but does not add checks because numpy-base is still unavailable externally for 3.14 and checks will be failed till that moment

[ekomarova]

For some reason, when building, free threading python is used

"mkl_fft": [
     {
        "depends": [
          "__glibc >=2.28,<3.0.a0",
          "libgcc >=15",
          "mkl-service",
          "numpy-base >=2.3.2,<3.0a0",
          "python >=3.14,<3.15.0a0",
          "python_abi 3.14.* *_cp314t"
        ]

[ekomarova]

I'll rebuild mkl-service and numpy-base to fix the build

[ekomarova]

To continue, we need to fix this #236

[skupr-anaconda]

We have the same issue AnacondaRecipes/mkl_fft-feedstock#12 (comment). Our numpy-base for py314 is already available https://anaconda.org/anaconda/numpy-base/files

[jharlow-intel]

@antonwolfy @xaleryb @ndgrigorian ready for final review, all CI checks are green

[ndgrigorian]

LGTM, we will need to do something similar in other mkl packages now