Add Wait & Notify OpCodes to Singlepass Compiler

[ptitSeb]

Motivation

Once the helper function are created with #3155 , adding the opcode should be straitforward.

Proposed solution

Using the helper functions, add the 3 missing opcodes and enable the threads::atomic tests for Singlepass Compiler.

If needed, specs are there: https://github.com/WebAssembly/threads/blob/main/proposals/threads/Overview.md