New threadpool, fixed in NR UE

This merge request is an attempt to fix the new thread pool implementation for use in NR UE and gNB (as well as eNB).

common/utils/task_manager/thread_pool/tests/CMakeLists.txt

+add_executable(test_ws-thread-pool test_thread_pool.c)
+target_link_libraries(test_ws-thread-pool PRIVATE ws-thread-pool minimal_lib)
+add_dependencies(tests test_ws-thread-pool)
+add_test(NAME test_ws-thread-pool
+  COMMAND ./test_ws-thread-pool)