Upgrade protobuf to 3.21.9 (#21679)

Signed-off-by: Enwei Jiao <enwei.jiao@zilliz.com>

internal/core/CMakeLists.txt

@@ -88,6 +88,7 @@ include( ${CMAKE_BINARY_DIR}/conan/conanbuildinfo.cmake )
 set( CONAN_DISABLE_CHECK_COMPILER ON )
 conan_basic_setup( KEEP_RPATHS )
 
+set( CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} ${CONAN_PROTOBUF_ROOT})
 message( STATUS "cmake prefix path ${CMAKE_PREFIX_PATH}")
 
 include( CTest )

internal/core/conanfile.py

@@ -14,7 +14,7 @@ class MilvusConan(ConanFile):
         "aws-sdk-cpp/1.9.234",
         "benchmark/1.7.0",
         "gtest/1.8.1",
-        "protobuf/3.9.1",
+        "protobuf/3.21.9",
         "rapidxml/1.13",
         "yaml-cpp/0.7.0",
         "marisa/0.2.6",

internal/core/src/pb/CMakeLists.txt

@@ -9,6 +9,7 @@
 # is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 # or implied. See the License for the specific language governing permissions and limitations under the License
 
+find_package(Protobuf REQUIRED)
 set( proto_file_names
     schema.proto
     common.proto