wasm2c: Add macro and tests to allow disabling stack exhaustion checks #2356
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(Continued from #2354)
This PR adds an macro
WASM_RT_NONCONFORMING_STACK_UNCHECKED
to allow the embedder to unsafely remove all stack checks from wasm2c. This would mean the embedder is not conformant with the Wasm spec. This configuration is useful for embedders like RLBox which are unlikely to be affected by stack exhaustion, and don't want to pay performance penalties for this. The wasm2c build in CI that uses rlbox flags has been correspondingly updated to capture this.