cmake H3_HAVE_VLA examples

OriginHubAI/MyScaleDB contrib/h3-cmake/CMakeLists.txt :36 

target_compile_definitions(_h3 PRIVATE H3_HAVE_VLA)

chdb-io/chdb contrib/h3-cmake/CMakeLists.txt :43 

target_compile_definitions(_h3 PRIVATE H3_HAVE_VLA)

ClickHouse/ClickHouse contrib/h3-cmake/CMakeLists.txt :43 

target_compile_definitions(_h3 PRIVATE H3_HAVE_VLA)