tracing: ctf: Fix arguments for socket tracing functions (again)

Zephyr's socklen_t was changed in
c546c1cad1f86977dbf3fb3354469db9cda926aa
to be uint32_t instea of size_t.
Let's fix accordingly the prototypes which expect it.

Note this was already fixed in
37ff1b254fdf84c5fd9787cd2223342d7bfb1931
But it was reverted in
d849ab12639e9faf754f38fc2bd7315c31fd2fad

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>