wifi: rtw89: coex: Separated Wi-Fi connecting event from Wi-Fi scan event

Wi-Fi connecting process don't need to assign to firmware slot control,
if assign firmware slot control for Wi-Fi connecting event, firmware will
not toggle slots because driver don't tell the slot schedule to firmware.
Wi-Fi connecting event end should also cancel the 4way handshake status.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250110015416.10704-3-pkshih@realtek.com