Fall back to older macos test runners

Yikes.  manifold 2 uses thrust, which uses cuda headers (even when not building
with cuda support) and the cuda headers have their own copies of libc++ headers
- which conflict big time when trying to build with newer xcode.

See if the older github runner has a toolchain we can use - if 14 doens't work
we can try falling back to 13, but if neither of them can do it we'll just have
to disable osx for this release - updating manifold v2 to be compatible is much
too large a lift, and bumping to v3 (alread done in main) is NOT patch release
material - the 2->3 shift was significant behaviorially.

Author: starseeker

.github/workflows/check.yml

@@ -248,7 +248,7 @@ jobs:
 
   osx_release:
     name: macOS Clang Release Build
-    runs-on: macos-latest
+    runs-on: macos-14
     strategy:
       fail-fast: true
     steps:
@@ -276,7 +276,7 @@ jobs:
 
   osx_debug:
     name: macOS Clang Debug Build
-    runs-on: macos-latest
+    runs-on: macos-14
     strategy:
       fail-fast: true
     steps:

manifold/CMakeLists.txt

@@ -14,8 +14,6 @@ if (ENABLE_MANIFOLD)
   ExternalProject_Add(MANIFOLD_BLD
     URL "${CMAKE_CURRENT_SOURCE_DIR}/manifold"
     BUILD_ALWAYS ${EXT_BUILD_ALWAYS} ${LOG_OPTS}
-    PATCH_COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/thrust.patch
-    COMMAND ${PATCH_EXECUTABLE};-E;-p1;${PATCH_OPTIONS};-i;${CMAKE_CURRENT_SOURCE_DIR}/cuda.patch
     CMAKE_ARGS
     ${BUILD_TYPE_SPECIFIER}
     $<$<BOOL:${ZLIB_TARGET}>:-DZ_PREFIX=ON>
@@ -31,8 +29,6 @@ if (ENABLE_MANIFOLD)
     -DCMAKE_INSTALL_LIBDIR:PATH=${LIB_DIR}
     -DCMAKE_INSTALL_RPATH=${CMAKE_BUNDLE_INSTALL_PREFIX}/${LIB_DIR}
     -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=ON
-    -DTHRUST_DEVICE_SYSTEM=CPP
-    -DTHRUST_HOST_SYSTEM=CPP
     LOG_CONFIGURE ${EXT_BUILD_QUIET}
     LOG_BUILD ${EXT_BUILD_QUIET}
     LOG_INSTALL ${EXT_BUILD_QUIET}