[python] Add command for closing an open connection

[Damian-Nordic]

Problem

Currently, the CHIP stack is not able to automatically recover an open CASE session in certain circumstances such as a device
reboot.

Change overview

Add a command for closing an open session on the controller side so that the connection can be started from scratch when necessary.

Testing

Tested manually with nRF Connect Lock:

• commissioned the device
• rebooted the device
• run "close-session "
• sent a few ZCL commands to verify that another CASE session was established and the communication got back to normal.

[yunhanw-google]

/rebase

[github-actions]

Size increase report for "esp32-example-build" from 110ef41

File	Section	File	VM
chip-temperature-measurement-app.elf	.flash.text	60	60

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-pigweed-app.elf and ./pull_artifact/chip-pigweed-app.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-persistent-storage.elf and ./pull_artifact/chip-persistent-storage.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-temperature-measurement-app.elf and ./pull_artifact/chip-temperature-measurement-app.elf:

sections,vmsize,filesize
[Unmapped],0,4036
.flash.text,60,60

Comparing ./master_artifact/chip-lock-app.elf and ./pull_artifact/chip-lock-app.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-all-clusters-app.elf and ./pull_artifact/chip-all-clusters-app.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-shell.elf and ./pull_artifact/chip-shell.elf:

sections,vmsize,filesize

[LuDuda]

LGTM 👍

Could you update the README.md with the new command? Alternatively, if it's expensive to maintain, instruct to call the help command or sth..

[yunhanw-google]

Anyone merge this one?