fix: statedump: undefined symbols caused by incorrect patch backport

bb346792c2cb ("fix: tracepoint: Optimize using static_call() (v5.10)")
misses three definitions and causes the following build failures.

ERROR: "__tracepoint_lttng_statedump_process_net_ns" [lttng-statedump.ko] undefined!
ERROR: "__tracepoint_lttng_statedump_process_user_ns" [lttng-statedump.ko] undefined!
ERROR: "__tracepoint_lttng_statedump_process_uts_ns" [lttng-statedump.ko] undefined!

Fixes: #1290
Signed-off-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>