chore: auto-detect TARGET_ARCH in cmake instead of hardcoding in preset#21621

ludamad merged 2 commits intomr/m3-build-fixesAztecProtocol/aztec-packages:mr/m3-build-fixesfrom

claudebox/fix-cmake-arch-detectionAztecProtocol/aztec-packages:claudebox/fix-cmake-arch-detectionCopy head branch name to clipboard