config: remove experimental label for SOC_NRF54L15

[ktaborowski]

KRKNWK-19515

CI parameters

Github_actions:
  #(branch, hash, pull/XXX/head)
  NRF_revision: main

  # Do not change after creating PR
  Create_NRF_PR: false
Jenkins:
  test-sdk-sidewalk: master

Description

JIRA ticket:

Self review

• There is no commented code.
• There are no TODO/FIXME comments without associated issue ticket.
• Commits are properly organized.
• Change has been tested.
• Tests were updated (if applicable).

[github-actions]

Sample		diff	used	total
nrf54l15dk/nrf54l15/cpuapp:sample.sidewalk.dut	RAM	0 B	141.14 KB	0 B
	ROM	-8 B	520.56 KB	0 B
nrf54l15dk/nrf54l15/cpuapp:sample.sidewalk.dut.no_secure	RAM	0 B	141.13 KB	0 B
	ROM	-8 B	509.69 KB	0 B
nrf54l15dk/nrf54l15/cpuapp:sample.sidewalk.hello	RAM	0 B	118.63 KB	0 B
	ROM	-8 B	465.57 KB	0 B
nrf54l15dk/nrf54l15/cpuapp:sample.sidewalk.hello.ble_only	RAM	0 B	92.45 KB	0 B
	ROM	-8 B	371.21 KB	0 B
thingy53/nrf5340/cpuapp:sample.sidewalk.demo.ble_only	RAM	0 B	106.31 KB	0 B
	ROM	-8 B	351.2 KB	0 B
nrf52840dk/nrf52840:sample.sidewalk.demo	RAM	0 B	118.01 KB	0 B
	ROM	-8 B	450.52 KB	0 B
nrf52840dk/nrf52840:sample.sidewalk.demo.ble_only	RAM	0 B	102.94 KB	0 B
	ROM	-8 B	368.15 KB	0 B
nrf52840dk/nrf52840:sample.sidewalk.dut	RAM	0 B	141.65 KB	0 B
	ROM	-8 B	515.59 KB	0 B
nrf52840dk/nrf52840:sample.sidewalk.dut.no_secure	RAM	0 B	141.63 KB	0 B
	ROM	-8 B	507.05 KB	0 B
nrf52840dk/nrf52840:sample.sidewalk.hello	RAM	0 B	119.24 KB	0 B
	ROM	-8 B	465.56 KB	0 B
nrf52840dk/nrf52840:sample.sidewalk.hello.ble_only	RAM	0 B	92.76 KB	0 B
	ROM	-8 B	366.5 KB	0 B
nrf5340dk/nrf5340/cpuapp:sample.sidewalk.demo	RAM	0 B	111.49 KB	0 B
	ROM	-8 B	395.3 KB	0 B
nrf5340dk/nrf5340/cpuapp:sample.sidewalk.demo.ble_only	RAM	0 B	96.57 KB	0 B
	ROM	-8 B	311.73 KB	0 B
nrf5340dk/nrf5340/cpuapp:sample.sidewalk.dut	RAM	0 B	135.26 KB	0 B
	ROM	-8 B	461.11 KB	0 B
nrf5340dk/nrf5340/cpuapp:sample.sidewalk.dut.no_secure	RAM	0 B	135.24 KB	0 B
	ROM	-8 B	453.66 KB	0 B
nrf5340dk/nrf5340/cpuapp:sample.sidewalk.hello	RAM	0 B	112.98 KB	0 B
	ROM	-8 B	410.61 KB	0 B
nrf5340dk/nrf5340/cpuapp:sample.sidewalk.hello.ble_only	RAM	0 B	86.65 KB	0 B
	ROM	-8 B	310.31 KB	0 B
nrf54l15dk/nrf54l15/cpuapp:sample.sidewalk.demo	RAM	0 B	117.18 KB	0 B
	ROM	-8 B	450.53 KB	0 B
nrf54l15dk/nrf54l15/cpuapp:sample.sidewalk.demo.ble_only	RAM	0 B	102.41 KB	0 B
	ROM	-8 B	372.89 KB	0 B