Coremltools 9.0

Compare to 8.3.0 (including features from 9.0b1)

• Added Python 3.13 support.
• Bug fix related to upsample_bilinear.
• Fixed the lowering of broadcast_to for symbolic and dynamic shapes.
• Support for model input/output with int8 dtype.
• Ability to read and write model state.
• iOS26/macOS26/watchOS26/tvOS26 deployment targets.
• AllowLowPrecisionAccumulationOnGPU optimization hint.
• Support for PyTorch 2.7 and ExecuTorch 0.5.
• Additional metadata automatically added to converted models.
• Optimize im2col PyTorch operation.
• Various other bug fixes, enhancements, clean ups and optimizations.

Special thanks to our external contributors for this release:
@orena1 , @M-Quadra, @noobsiecoder, @metascroy, @hasn77, @Pranaykarvi