Tests: Fix failures on macOS arm64 due to Xcode 15 skipping ad-hoc signature Update commit 1c15eb39d2 (Tests: Suppress failures on macOS arm64 due to separate Xcode signing phase, 2021-02-22, v3.20.0-rc2~11^2) for Xcode 15, which ignores our `-Xlinker -adhoc_codesign` flag, prioritizes its own `-Xlinker -no_adhoc_codesign` flag, and does not add an ad-hoc signature at link time. Issue: #21845