Fixes #153668.

Summary

makeunicodedata.py currently emits _PyUnicode_ToNumeric() as a switch
with 2,023 case labels. On Windows ARM64, MSVC's /O2 optimizer consumes
excessive memory and the x86-hosted ARM64 compiler fails with C1002 while
compiling Objects/unicodectype.c.

Generate a sorted code-point table, a parallel value-index table, and a
table of the 151 UCD numeric-value entries instead. _PyUnicode_ToNumeric()
now uses binary search and still returns -1.0 for code points without a
numeric value. NUMERIC_MASK and _PyUnicode_IsNumeric() are unchanged.

This is a source-level alternative to the temporary build workaround in
#153669. That PR disables optimization for affected MSVC toolsets; this
change keeps optimization enabled by removing the compiler-stressing
generated switch.

Windows ARM64 result

VCTools 14.51.36231, Release /O2, on a Windows 11 ARM64 lab host:

Validation

• Full native ARM64 Release build: success.
• python -m test -j1 test_unicodedata test_str: 212 tests passed.
• python -m test -j1 -u cpu test_unicodedata: 73 tests passed.
• python -m test -j0 -x test_profiling: 49,207 tests passed across
  442 test files. test_profiling was excluded because its sampling
  coordinator hangs independently on this lab image.
• Exhaustively compared all 1,114,112 Unicode code points with the previous
  generated switch; all 2,023 numeric mappings and non-numeric results match.
• Tools\patchcheck\patchcheck.py: passed.

AI assistance: OpenAI Codex assisted with the investigation, implementation,
and validation. This PR is opened as a draft so the submitter can complete
the required human review before marking it ready.

• Issue: Windows Arm64 release build fails #153668