feat: lake: configurable MACOSX_DEPLOYMENT_TARGET - #14723
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This PR makes the
MACOSX_DEPLOYMENT_TARGETconfigurable via the Lake API -- both across a build and for custom builds of shared libraries or executables. It also includes the target in traces, ensuring a rebuilding if the value changes (e.g., if the environment variableMACOSX_DEPLOYMENT_TARGETis set).