Fix deprecations + updates

Summary

Resolves

• #95 (closed)
• #93 (closed)
• #89 (closed)
• #92 (closed)
• #86 (closed)
• #72 (closed)
• #70 (closed)

Focus

• Updating to Debian 12 made creating a venv in the Dockerfile necessary
• clang-format-11->clang-format-16
• no more deprecation warnings for inheriting from std::iterator
• boost::string_file was replaced by copying the implementation from boost

Test Environment

How to set up a test environment for manual testing?

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
  • How do I develop or debug the software? Assume novice developers.
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

test/CMakeLists.txt

@@ -51,7 +51,7 @@ set(_CMAKE_CXX_CLANG_TIDY_TEST_CHECKS
 )
 
 # add special cmake functions for gtest
-find_package(GTest REQUIRED)
+find_package(GTest CONFIG REQUIRED)
 include(GoogleTest)
 
 message(DEBUG "CMAKE_INCLUDE_PATH: ${CMAKE_INCLUDE_PATH}")
@@ -65,7 +65,7 @@ foreach (i RANGE "${len_test_cases}")
     set(liblinkahead_TEST_SRC "${CMAKE_CURRENT_SOURCE_DIR}/${test_case_name}.cpp
         ${liblinkahead_TEST_SRC}")
     target_link_libraries(${test_case_name}
-        PRIVATE GTest::gtest_main linkahead clinkahead gtest::gtest caosdb_grpc)
+        PRIVATE GTest::gtest_main linkahead clinkahead GTest::gtest caosdb_grpc ${Boost_LIBRARIES})
     target_include_directories(${test_case_name}
       PUBLIC ${CMAKE_CURRENT_BINARY_DIR}/include ${CMAKE_CURRENT_BINARY_DIR})     
      set_target_properties(${test_case_name} PROPERTIES RUNTIME_OUTPUT_DIRECTORY  "${CMAKE_BINARY_DIR}")