fix(compiler): preserve PHP switch comparison semantics

[yavon007]

Typed boolean switch subjects could take the wrong branch: true did not match case 2 after lowering to a C++ switch. Integer subjects with floating-point case labels generated invalid C++ and failed to compile.

Check all labels before lowering any case bodies. Keep the native switch path for integer labels whose comparisons agree with PHP, including boolean subjects with labels 0 and 1. Route other cases through the existing comparison path and convert labels to their PHP truth value when comparing a boolean subject.

Add separate PHPT regressions for boolean/numeric comparisons and integer subjects with floating-point labels.

Validation on Linux ARM64 with PHP 8.5.10:

• Both new regressions fail before the fix and pass afterward; their expected output matches plain PHP.
• tests/compiler/switch: 8/8 passed with native AOT compilation.
• LoopControlTest: 7 tests / 15 assertions passed.
• Applied together with the separate trailing-empty-case fix: all three new PHPT regressions passed.
• git diff --check passed.