net/local: fix SCM_RIGHTS pointer and memory corruption

[Bogdan0759]

Summary

Fix NULL pointer dereference and fix memory corruption by using file_put() instead of file_close() + kmm_free().
Add peer NULL check to local_freectl().

Impact

Fixes kernel panic and memory corruption after recvmsg(SCM_RIGHTS).

Testing

Board: qemu_intel64:nsh
Tested with program that exhausts fd table and call recvmsg(SCM_RIGHTS).

[xiaoxiang781216]

@Bogdan0759 please fix ci error:

0c3e75cd0c Merge e8f9b3ba010cc1e6bc0e79cc6ec0bcc15c3edcab into 6ccb459e1a79c4a0de4e32353f98b72d2bc081e1
e8f9b3ba01 net/local: fix SCM_RIGHTS pointer and memory corruption
../nuttx/tools/checkpatch.sh -c -u -m -g  6ccb459e1a79c4a0de4e32353f98b72d2bc081e1..HEAD
❌ Missing Signed-off-by
Used config files:
    1: .codespellrc
Some checks failed. For contributing guidelines, see:
  https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md

[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• arduino-mega2560
• esp32-devkitc
• hifive1-revb
• mirtoo
• qemu-armv8a
• qemu-intel64
• rx65n-rsk2mb
• s698pm-dkit
• stm32-nucleo-f103rb

[Bogdan0759]

@Bogdan0759 please fix ci error:

0c3e75cd0c Merge e8f9b3ba010cc1e6bc0e79cc6ec0bcc15c3edcab into 6ccb459e1a79c4a0de4e32353f98b72d2bc081e1
e8f9b3ba01 net/local: fix SCM_RIGHTS pointer and memory corruption
../nuttx/tools/checkpatch.sh -c -u -m -g  6ccb459e1a79c4a0de4e32353f98b72d2bc081e1..HEAD
❌ Missing Signed-off-by
Used config files:
    1: .codespellrc
Some checks failed. For contributing guidelines, see:
  https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md

Added

[jerpelea]

please add a commit message describing the change

[Bogdan0759]

please add a commit message describing the change

Done