[BUG] [NeoPixel] [ESP8266] NeoPixel plugins are fixed on GPIO-2 since NeoPixelBus_Wrapper was introduced

[tonhuisman]

Describe the bug
ESP8266 only: Since introducing a wrapper around NeoPixelBus for Adafruit_NeoPixel compatibility, selecting a GPIO pin for connecting the pixels is available, but it is always initialized on GPIO-2.

Source: #4917 (comment)

To Reproduce
Plugins showing this behavior:

1. P038 - Neopixel (Basic)
2. P041 - NeoPixel (Word Clock)
3. P042 - NeoPixel (Candle)
4. P070 - NeoPixel Ring Clock
5. P131 - NeoPixel Matrix

Not applicable to:

1. P128 - NeoPixel (BusFX) : This plugin is based on the NeoPixelBus library, that ignores the GPIO selection on ESP8266

Expected behavior
The selected GPIO should be used for controlling the NeoPixels

Used platform (please complete the following information):

• ESP type: ESP8266 (only)

Proposed solution:

• Revert to using Adafruit_NeoPixel library for ESP8266