applications: serial_lte_modem: Remove use of CONFIG_UART_x_NRF_HW_ASYNC

[trantanen]

Use of CONFIG_UART_x_NRF_HW_ASYNC has been mostly removed earlier from SLM app side with PR #19720. Removing last few references.
This causes some overlays to become empty so they are deleted.
Also, removing from SLM shell.

[NordicBuilder]

CI Information

^{To view the history of this post, clich the 'edited' button above}
Build number: 3

Inputs:

Sources:

sdk-nrf: PR head: 34a77df2d1a57f4e4d0e74ba7b36147331f62f72

more details

sdk-nrf:

PR head: 34a77df2d1a57f4e4d0e74ba7b36147331f62f72
merge base: db6b981054e3a7acd40e2a883af52013fde89d97
target head (main): 3d408ef01e7b886608abf142cf8c6afc2ccf3041
Diff

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (8)

applications
│  ├── serial_lte_modem
│  │  ├── doc
│  │  │  ├── nRF91_as_Zephyr_modem.rst
│  │  │  │ slm_description.rst
│  │  ├── overlay-ppp-without-cmux.conf
│  │  ├── overlay-zephyr-modem-external-mcu.conf
│  │  │ overlay-zephyr-modem-nrf9160dk-nrf52840.conf
samples
│  ├── cellular
│  │  ├── slm_shell
│  │  │  ├── boards
│  │  │  │  ├── nrf52840dk_nrf52840.conf
│  │  │  │  ├── nrf5340dk_nrf5340_cpuapp.conf
│  │  │  │  │ nrf7002dk_nrf5340_cpuapp.conf

Outputs:

Toolchain

Version: 4ffa2202d5
Build docker image: docker-dtr.nordicsemi.no/sw-production/ncs-build:4ffa2202d5_8bf7ca4353

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ◻️ Toolchain - Skipped: existing toolchain is used
• ✅ Build twister
  • sdk-nrf test count: 227
• ✅ Integration tests
  • ✅ test-fw-nrfconnect-nrf-iot_serial_lte_modem

Disabled integration tests

• • desktop52_verification
  • doc-internal
  • test_ble_nrf_config
  • test-fw-nrfconnect-apps
  • test-fw-nrfconnect-ble_mesh
  • test-fw-nrfconnect-ble_samples
  • test-fw-nrfconnect-boot
  • test-fw-nrfconnect-chip
  • test-fw-nrfconnect-fem
  • test-fw-nrfconnect-nfc
  • test-fw-nrfconnect-nrf-iot_cloud
  • test-fw-nrfconnect-nrf-iot_libmodem-nrf
  • test-fw-nrfconnect-nrf-iot_lwm2m
  • test-fw-nrfconnect-nrf-iot_mosh
  • test-fw-nrfconnect-nrf-iot_positioning
  • test-fw-nrfconnect-nrf-iot_samples
  • test-fw-nrfconnect-nrf-iot_thingy91
  • test-fw-nrfconnect-nrf-iot_zephyr_lwm2m
  • test-fw-nrfconnect-nrf_crypto
  • test-fw-nrfconnect-proprietary_esb
  • test-fw-nrfconnect-ps
  • test-fw-nrfconnect-rpc
  • test-fw-nrfconnect-rs
  • test-fw-nrfconnect-tfm
  • test-fw-nrfconnect-thread
  • test-low-level
  • test-sdk-audio
  • test-sdk-dfu
  • test-sdk-find-my
  • test-sdk-mcuboot
  • test-sdk-pmic-samples
  • test-sdk-wifi
  • test-secdom-samples-public

Note: This message is automatically posted and updated by the CI

[github-actions]

You can find the documentation preview for this PR here.

Preview links for modified nRF Connect SDK documents:

https://ncsdoc.z6.web.core.windows.net/PR-21247/nrf/applications/serial_lte_modem/doc/nRF91_as_Zephyr_modem.html
https://ncsdoc.z6.web.core.windows.net/PR-21247/nrf/applications/serial_lte_modem/doc/slm_description.html