Stop the driver from killing everything on FUNC_SAVE_BEFORE_RESTART -…

[btsimonh]

… since this is called in many other circumstances than an actual restart.

Description:

When applying other settings in various scenarios, settingssaveAll() is called, triggering FUNC_SAVE_BEFORE_RESTART.
The code responded to this by closing the webcam thread and cleaning up sockets, etc., expecting to go through a restart.

This commit disables this feature.

Tested on esp32s3 with cam and bluetooth enabled.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.6
• The code change is tested and works with Tasmota core ESP32 V.3.0.0
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass

[btsimonh]

Please hold this one.... Just realised WHY it's important to kill everything for a restart....
The Cam itself needs to be disabled, else in a restart scenario, it may not come back cleanly.
Hence implementing this change may mean you need to stop & start the cam after a restart.

Maybe better to think on #21460 before we jump.

[btsimonh]

closing awaiting a new function for ending stuff at shutdown/restart...