fix: Pass utf8_range_DIR to triton-server build

The protobuf bundled with gRPC v1.81.1 (v33.5) installs utf8_range as a
separate CMake package and protobuf-config.cmake references the
utf8_range::utf8_validity imported target. find_package(Protobuf CONFIG)
with only Protobuf_DIR set fails at generate time with 'the target was
not found'. Provide utf8_range_DIR alongside Protobuf_DIR.

Author: mc-nv

CMakeLists.txt

@@ -167,6 +167,7 @@ if (OPENSSL_ROOT_DIR)
 endif()
 
 set(_FINDPACKAGE_PROTOBUF_CONFIG_DIR "${TRITON_THIRD_PARTY_INSTALL_PREFIX}/protobuf/${LIB_DIR}/cmake/protobuf")
+set(_FINDPACKAGE_UTF8_RANGE_CONFIG_DIR "${TRITON_THIRD_PARTY_INSTALL_PREFIX}/protobuf/${LIB_DIR}/cmake/utf8_range")
 
 set(_FINDPACKAGE_OPENTELEMETRY_CONFIG_DIR "${TRITON_THIRD_PARTY_INSTALL_PREFIX}/opentelemetry-cpp/${LIB_DIR}/cmake/opentelemetry-cpp")
 
@@ -199,6 +200,7 @@ ExternalProject_Add(triton-server
   BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/triton-server"
   CMAKE_CACHE_ARGS
     -DProtobuf_DIR:PATH=${_FINDPACKAGE_PROTOBUF_CONFIG_DIR}
+    -Dutf8_range_DIR:PATH=${_FINDPACKAGE_UTF8_RANGE_CONFIG_DIR}
     ${_CMAKE_ARGS_OPENSSL_ROOT_DIR}
     ${_CMAKE_ARGS_CMAKE_TOOLCHAIN_FILE}
     ${_CMAKE_ARGS_VCPKG_TARGET_TRIPLET}