* Limit OpenThread CLI buffers as RAM optimization

[tima-q]

Problem

OpenThread default CLI buffer sizes are not required for Thread debug actions done within the Matter examples.

Change overview

• Reduced CLI sizes to reduce RAM overhead of CLI interface.
• 640 bytes static RAM freed

Testing

• Checked RAM usage decrease by comparison of compilation QPG6100 lighting-app before/after changes
• Performed typical debug commands - 'help', 'state', 'ipaddr', ...
• Internal automated test using OT CLI itf ran - join with commissioner, receive a ping

[github-actions]

Size increase report for "gn_qpg6100-example-build" from 2183830

File	Section	File	VM
chip-qpg6100-lighting-example.out	.heap	0	640
chip-qpg6100-lighting-example.out	.bss	0	-640

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-qpg6100-lighting-example.out and ./pull_artifact/chip-qpg6100-lighting-example.out:

sections,vmsize,filesize
.heap,640,0
.bss,-640,0

Comparing ./master_artifact/chip-qpg6100-lighting-example.out.map and ./pull_artifact/chip-qpg6100-lighting-example.out.map:

BLOAT EXECUTION FAILED WITH CODE 1:
bloaty: unknown file type for file './pull_artifact/chip-qpg6100-lighting-example.out.map'

[bukepo]

Is QPG6100 going to migrate to the new OpenThread CLI API?. It doesn't require such a buffer any more.