Resynch utils and common from common-src and use new FlowDirection fix

Changes

• Resynch with common-src
• Removed unused code
• Removed code that is part of common-src now - especially utils and common
• Also moved to new CPR-based HTTP client in common-src

Fixes reading of FlowDirection from YAML

Common-src MR: oai-cn5g-common-src!58 (merged)

docker/Dockerfile.pcf.rhel9

@@ -128,6 +128,7 @@ COPY --from=oai-pcf-builder \
     /usr/local/lib64/libspdlog.so \
     /usr/local/lib64/libfmt.so \
     /usr/local/lib64/libyaml-cpp.so.0.* \
+    /usr/local/lib64/libcpr.so.1 \
     /usr/lib64/
 
 RUN ldconfig && \