samples: openthread: Adding HCI capabilities in RCP sample.

[canisLupus1313]

Commit adds hci functionality to openthread coprocessor sample.

[NordicBuilder]

The following west manifest projects have been modified in this Pull Request:

Name	Old Revision	New Revision	Diff
zephyr	nrfconnect/sdk-zephyr@90a72da	nrfconnect/sdk-zephyr@0c7fcf3 (main)	nrfconnect/[email protected]

Note: This message is automatically posted and updated by the Manifest GitHub Action.

[NordicBuilder]

You can find the documentation preview for this PR at this link. It will be updated about 10 minutes after the documentation build succeeds.

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[maciejbaczmanski]

Suggestion on including HCI files only if overlay is chosen in subcomments.

Regarding .conf and .overlay files, they can be moved to snippets/hci directory after #12909 .
In the same directory, snippet.yml should be created, containing:

name: hci
append:
  EXTRA_CONF_FILE: hci.conf
  EXTRA_DTC_OVERLAY_FILE: hci.overlay

and in sample.yaml line:

extra_args: OVERLAY_CONFIG=overlay-hci.conf DTC_OVERLAY_FILE="rcp_hci.overlay"

changed to

extra_args: SNIPPET=hci

[NordicBuilder]

Test specification

CI/Jenkins/NRF

• Integration Platforms

CI/Jenkins/integration

Test Module	File based changes	Manually selected	West overwrite
desktop52_verification	X
test-fw-nrfconnect-fem	X
test-fw-nrfconnect-rpc	X
test-fw-nrfconnect-rs	X
test-fw-nrfconnect-thread	X
test-sdk-find-my	X

Detailed information of selected test modules

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[edmont]

Looks like a nice feature, but should we cover it with some specific testing?