[hle] correct IClientProcess::RegisterClient, impl cmd 3100,3102 for ns:vm (#4376)

ldn had wrong signature
ns:vm had missing function stubs that would make some games assert on missing impl

Signed-off-by: lizzie <lizzie@eden-emu.dev>

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4376
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Maufeat <sahyno1996@gmail.com>

src/core/CMakeLists.txt

@@ -711,8 +711,6 @@ add_library(core STATIC
     hle/service/kernel_helpers.h
     hle/service/lbl/lbl.cpp
     hle/service/lbl/lbl.h
-    hle/service/ldn/client_process_monitor.cpp
-    hle/service/ldn/client_process_monitor.h
     hle/service/ldn/lan_discovery.cpp
     hle/service/ldn/lan_discovery.h
     hle/service/ldn/ldn.cpp
@@ -832,8 +830,6 @@ add_library(core STATIC
     hle/service/ns/system_update_control.h
     hle/service/ns/system_update_interface.cpp
     hle/service/ns/system_update_interface.h
-    hle/service/ns/vulnerability_manager_interface.cpp
-    hle/service/ns/vulnerability_manager_interface.h
     hle/service/nvdrv/core/container.cpp
     hle/service/nvdrv/core/container.h
     hle/service/nvdrv/core/heap_mapper.cpp
@@ -1067,8 +1063,6 @@ add_library(core STATIC
     hle/service/sockets/sockets.h
     hle/service/sockets/sockets_translate.cpp
     hle/service/sockets/sockets_translate.h
-    hle/service/spl/csrng.cpp
-    hle/service/spl/csrng.h
     hle/service/spl/spl.cpp
     hle/service/spl/spl.h
     hle/service/spl/spl_module.cpp