Configure CMake to not build flatbuffers tests and samples (Project-OSRM#6274)

* Do not build flatbuffers tests and samples

Author: SiarheiFedartsou

CHANGELOG.md

@@ -3,7 +3,8 @@
     - API:
       - FIXED: Fix inefficient osrm-routed connection handling [#6113](https://github.com/Project-OSRM/osrm-backend/pull/6113)
     - Build:
-      - CHANGED: Enable more clang-tidy checks. [#6262](https://github.com/Project-OSRM/osrm-backend/pull/6270)
+      - CHANGED: Configure CMake to not build flatbuffers tests and samples. [#6274](https://github.com/Project-OSRM/osrm-backend/pull/6274)
+      - CHANGED: Enable more clang-tidy checks. [#6270](https://github.com/Project-OSRM/osrm-backend/pull/6270)
       - CHANGED: Configure clang-tidy job on CI. [#6261](https://github.com/Project-OSRM/osrm-backend/pull/6261)
       - CHANGED: Use Github Actions for building container images [#6138](https://github.com/Project-OSRM/osrm-backend/pull/6138)
       - CHANGED: Upgrade Boost dependency to 1.70 [#6113](https://github.com/Project-OSRM/osrm-backend/pull/6113)

CMakeLists.txt

@@ -459,6 +459,7 @@ include_directories(SYSTEM ${PROTOZERO_INCLUDE_DIR})
 set(VTZERO_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/vtzero/include")
 include_directories(SYSTEM ${VTZERO_INCLUDE_DIR})
 
+set(FLATBUFFERS_BUILD_TESTS OFF CACHE BOOL "Disable the build of Flatbuffers tests and samples.")
 set(FLATBUFFERS_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/flatbuffers")
 set(FLATBUFFERS_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/flatbuffers/include")
 include_directories(SYSTEM ${FLATBUFFERS_INCLUDE_DIR})