Xcode cache daemon now respects the TUIST_CACHE_ENDPOINT override

Fixed an issue where the Xcode compilation cache daemon could ignore the TUIST_CACHE_ENDPOINT environment override. When running in environments such as a runner that dispatches a private cache endpoint, the daemon now uses that same private endpoint instead of resolving the public one. This keeps the CAS cache aligned with the module cache and avoids the performance regression where the Xcode cache could be slower than a full rebuild.