Align MakeCode simulator behaviour with CODAL behaviour during concurrent access to LED display

The MakeCode simulator behaves subtly differently to the micro:bit hardware when running programs that attempt concurrent access to the display, resulting in content being displayed in a different order.

To Reproduce
Run the following program (or similar) in the simulator.

The simulator interleaves the display icons between each forever loop, displaying:

• Big Heart
• Smiley
• Small Heart
• Surprised Face

Expected behaviour
The micro:bit firmware (CODAL) by design gives priority to fibers already holding a lock on the display before using a fair round-robin algorithm to allow other fibers access to the display. i.e. back to back operations that access the display are treated as atomic, allowing more intuitive behave for kids and teachers.

The hardware therefore results in the following display order:

• Big Heart
• Small Heart
• Smiley
• Surprised Face

Screenshots
As above

micro:bit version (please complete the following information):
All versions (anticipated). Verified on V1.3 and V2.21.

Desktop (please complete the following information):
All versions (anticipated). Tested on:

• OS: Windows 11
• Browser: Chrome
• Version 111.0.5563.64

Smartphone (please complete the following information):
-N/A

Additional context
Please note previous discussion here:
https://github.com/lancaster-university/codal-microbit-v2/issues/253