Fix boolean scalar support in portable arange

[Air-crypto]

Summary

• accept boolean scalar arguments in the portable arange kernels by converting them to numeric 0/1 values locally
• preserve the existing numeric scalar extraction behavior for non-boolean arguments
• add regression coverage for boolean end, start, and step arguments

Fixes #13580

Test plan

• cmake --build cmake-out -j 8 --target portable_kernels_test
• ./cmake-out/kernels/test/portable_kernels_test --gtest_filter='OpArangeOutTest.*:OpArangeStartOutTest.*' (14 passed, 2 skipped)
• ./cmake-out/kernels/test/portable_kernels_test (1527 passed, 104 skipped)
• .venv/bin/clang-format --dry-run --Werror kernels/portable/cpu/op_arange.cpp kernels/test/op_arange_test.cpp
• git diff --check

[pytorch-bot]

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⚠️ 14 Awaiting Approval

As of commit ec7bba9 with merge base cff6f4d ():

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[linux-foundation-easycla]

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• ✅ login: Air-crypto / name: Arihan Yadav (ec7bba9)

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