👷 MLIR - Set up macOS CI

[WingCode]

Copied from munich-quantum-toolkit/core #955

Problem Statement

Set up a macOS CI workflow for the MLIR subcomponent of MQT Core.

Proposed Solution

A dedicated workflow job in the ci_mlir.yml file similar to the existing Ubuntu tests.
This should cover at least macos-13 (x86_64) as well as macos-14 (arm64).