[meson] Drop CMake-built ICU support, fixing fallback to wrap >= 77.1-3 The WrapDB ICU wrap switched from the transitional "icu-uc = icuuc_dep" syntax to the recommended "dependency_names = icu-uc", which apparently broke our fallback path because we passed a components: argument to dependency() for CMake (mesonbuild/meson#14979). Per review guidance, drop support for CMake-built ICU.