Beta: Neopixels in simulator show wrong colours when not GRB

[martinwork]

Describe the bug Neopixels in the simulator show wrong colours, unless the strip is specified to be GRB. It's the same in live and beta.

Related: https://github.com/microsoft/pxt-microbit/issues/3134 https://github.com/microsoft/pxt-microbit/issues/2940

Arising from https://support.microbit.org/helpdesk/tickets/63295 (private)

To Reproduce Steps to reproduce the behavior:

1. Load https://makecode.microbit.org/_D7bVAgdLYdEr
2. See red in simulator

Expected behavior The neopixels in the simulator show the correct colours

Screenshots

micro:bit version (please complete the following information): not hardware related

Desktop (please complete the following information):

• OS: [e.g. iOS] Windows
• Browser [e.g. chrome, safari] Chrome
• Version [e.g. 22] 113