samples: update sidewalk version

[ktaborowski]

update sidewalk version to v2.9.99

CI parameters

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

  # Do not change after creating PR
  Create_NRF_PR: true
Jenkins:
  test-sdk-sidewalk: master
  # To reconfigure functional tests:
  # use GH labels func-* (default is func-commit)
  # or
  # Use YAML Filters. Helper side to set filters: https://tester-pc.nordicsemi.no:8080/test_mgmt
  # Filters (place copied YAML filters here):
  #  - filter1:
  #     board: nrf52

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

Memory usage did not change for any of the samples.