When running ttcn3-bts-test, parameters such as SETTA, FAKE_RSSI, FAKE_TOA, and others may persist across testcases if not explicitly reset, leading to unintended cross-test interference.
Reset all transceiver settings on CMD POWEROFF to ensure proper test isolation and predictable behavior between testcases.
Change-Id: I5c58bc684acc7a58d7aa940bb2ae7597d4a282f2 (cherry picked from commit 754d5ebb1e120e661fd3b1e025abfc5b5216ac80)
