Fix interaction of SO92, VirtualCT, and RGBWWTable

[jonschz]

Description:

Related issue (if applicable): fixes #15337

Previously, when SO92 (pwm_ct_mode) was enabled, VirtualCT would not work at all, and 5th entry of the RGBWWTable would affect the color temperature instead of the warm white intensity. With this patch, all options interact as intended. I did extensive testing with various modes to ensure that the code works as intended (cw, rgb, rgbw, rgbww with and without SO92, SO105 in all applicable modes, RGBWWTable, all with LEDTable enabled and disabled).

Nothing changes for users who have SO92 disabled.

For those that have SO92 enabled but do not use VirtualCT or RGBWWTable, there are tiny changes to the color temperature when LEDTable is enabled, most notable at low brightness and ct values around 240 (25 %) and around 413 (75 %). If needed, I can provide an argument why I believe the new values to be more correct than the old ones.

This restructure rendered some variables unnecessary, which I hence removed.

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.2.7.4.9 (tested on device)
• The code change is tested and works with Tasmota core ESP32 V.2.0.9 (tested in simulator)
• I accept the CLA.

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

[s-hadinger]

Thanks. Let me take a look at it.

[s-hadinger]

I'm always terrified when changing code in this portion because there are so many corner cases and configuration possibilities. I trust you in testing many different configurations. We can always revert if there are unexpected results.

[jonschz]

I trust you in testing many different configurations

Thank you for that. The change boils down to a different order of operations:

Old: SO92, VirtualCT (if not SO92), RGBWWTable
New: VirtualCT (unconditionally), RGBWWTable, SO92

I can explain the changes in greater detail if needed.

[s-hadinger]

Thanks for your contribution!