- Replace direct usage of OGS_ADDR/OGS_PORT macros with
ogs_sockaddr_to_string_static() for consistent IPv4/IPv6 logging.
- Remove redundant stack buffer allocations for address printing.
- Update PFCP node address handling to use addr_list and related
merges, avoiding obsolete sa_list references.
- Use ogs_pfcp_extract_node_id() and related APIs to safely extract
PFCP Node ID, improving error handling and reducing stack usage.
Created util.h and util.c to implement the ogs_pfcp_get_node_id function,
which retrieves the node_id from a PFCP message. Utilized the
ogs_pfcp_status_e enum for enhanced error handling, distinguishing
between success, absence, and error states.
