Support mx and my over qubit ranges

[spital]

Fixes #3334

Summary

This adds the missing C++ overloads that allow mx and my to measure qubit ranges such as cudaq::qvector.

mz already supports range, qview, and mixed variadic measurement arguments, but mx and my only accepted a single qubit&. As a result, code such as mx(qubits) or my(qubits) failed during C++ overload resolution even though the Quake dialect and lowering path already support vector X/Y-basis measurements.

The new overloads mirror the existing mz API shape for mx and my:

• range overloads, covering cudaq::qvector and other qubit ranges
• qview overloads
• mixed variadic overloads such as mx(q, range, q) / my(q, range, q)

The range and variadic overloads delegate to the existing single-qubit mx and my implementations. That keeps the basis-change behavior in exactly one place and avoids applying the X/Y basis conversion twice.

Context

This follows the review guidance from the earlier closed, unmerged attempt in #2231:

• add runtime coverage under unittests/
• add FileCheck coverage under test/AST-Quake
• use the issue reproducer shape as test input
• implement the same overload family that already exists for mz
• avoid adding basis-change operations in the range overloads because the scalar mx/my functions already perform them

The PR is intentionally limited to the missing public C++ header overloads plus tests. It does not change OpenQASM lowering, Python lowering, or the Quake measurement operations.

Tests

Local validation included targeted compiler/runtime tests and a full CTest pass:

• llvm-lit -sv build-source/cudaq/test --filter mx_my_qvector
  • 1/1 passed
• Targeted MeasureResetTester CTest run for the new runtime coverage:
  • MeasureResetTester.checkRangeBasisMeasurements
  • MeasureResetTester.checkMixedBasisOrderingAndPreservation
  • 16/16 passed across the configured variants
• Full CTest suite:
  • 1953/1953 passed
  • final run time: 1723.87s
  • only expected unavailable-backend / MPI tests were skipped
• Installed toolchain smoke tests:
  • cudaq-quake + FileCheck for the mx/my qvector test passed
  • nvq++ compiled and ran an installed mx/my qvector smoke test successfully

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