Important memory leak of v4l2-relayd service after each camera start

Hi dear developers,
Some time ago, I noticed an important memory leak of **v4l2-relayd** service on my Ubuntu 22.04.4 LTS laptop : **a couple of GB after some video calls**.

I decided to investigate using valgrind and found it comes from this lib.

I noticed **memory is leaked each time camera is restarted**.

```
==65931== 1,080 bytes in 2 blocks are definitely lost in loss record 5,731 of 6,137
==65931== at 0x484DA83: calloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==65931== by 0xA305045: icamera::CIPR::Command::Command(icamera::CIPR::PSysCommandConfig const&) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA28BB49: icamera::PGCommon::createCommand(icamera::CIPR::Buffer*, icamera::CIPR::Command**, icamera::CIPR::Buffer**, int) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA28BDAD: icamera::PGCommon::createCommands() (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA28C7A7: icamera::PGCommon::iterate(std::map, std::less, std::allocator > > >&, std::map, std::less, std::allocator > > >&, ia_binary_data*, ia_binary_data const*) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA27FD91: icamera::PipeLiteExecutor::runPipe(std::map, std::less, std::allocator > > >&, std::map, std::less, std::allocator > > >&, std::vector, std::allocator > >&, std::vector >&) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA281851: icamera::PipeLiteExecutor::processNewFrame() (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA249A37: ??? (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA29032E: icamera::Thread::_threadLoop(icamera::Thread*) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA015252: ??? (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.30)
==65931== by 0x4C16AC2: start_thread (pthread_create.c:442)
==65931== by 0x4CA7A03: clone (clone.S:100)
```

```
==65931== 36 bytes in 1 blocks are definitely lost in loss record 2,892 of 6,137
==65931== at 0x484DA83: calloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==65931== by 0xA30470C: icamera::CIPR::Context::registerBuffer(icamera::CIPR::MemoryDesc*) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA289916: icamera::PGCommon::createUserPtrCiprBuffer(int, void*, bool) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA28A304: icamera::PGCommon::registerUserBuffer(int, void*, bool) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA28B678: icamera::PGCommon::prepareTerminalBuffers(ia_binary_data const*, std::map, std::less, std::allocator > > > const&, std::map, std::less, std::allocator > > > const&, long) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA28C5A2: icamera::PGCommon::iterate(std::map, std::less, std::allocator > > >&, std::map, std::less, std::allocator > > >&, ia_binary_data*, ia_binary_data const*) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA27FD91: icamera::PipeLiteExecutor::runPipe(std::map, std::less, std::allocator > > >&, std::map, std::less, std::allocator > > >&, std::vector, std::allocator > >&, std::vector >&) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA281851: icamera::PipeLiteExecutor::processNewFrame() (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA249A37: ??? (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA29032E: icamera::Thread::_threadLoop(icamera::Thread*) (in /usr/lib/x86_64-linux-gnu/libcamhal/plugins/ipu6ep.so)
==65931== by 0xA015252: ??? (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.30)
==65931== by 0x4C16AC2: start_thread (pthread_create.c:442)
```
I plan to investigate a little bit further myself, please do not hesitate if you need more precisions :)

Best regards