WS2812 and Berry animation support for reverse-order LED strip

[s-hadinger]

Description:

ESP32 only, support for the WS2812 Led strip in reverse order:

• Pixels 32 sets a strip of 32 leds in normal order
• Pixels 32,1 sets a strip of 32 leds in reverse order

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.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.5
• I accept the CLA.

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