CM_BLINK_NEVER is hazardous with impOS 42

[gjanvier]

From impOS 42 and up, there will no longer be any period for which BlinkUp will always remain active after the code imp.enableblinkup(false); has run, even if the host imp is still in the BOOTING phase

So when we use a connection manager with blinkupBehavior set to CM_BLINK_NEVER, you may just brick your device if it cannot connect to the latest configured WiFi.

[sourav-gadgeon]

Given the 10-second window for BlinkUp during a cold boot, we can utilize this period to perform BlinkUp. If this approach doesn't work, clearing the credentials during this window and then performing BlinkUp should resolve the issue.